先人的DELPHI基础开发技巧

◇[DELPHI]网络邻居复制文件

uses shellapi;

copyfile(pchar('newfile.txt'),pchar('//computername/direction/targer.txt'),false);

◇[DELPHI]产生鼠标拖动效果

通过MouseMove事件、DragOver事件、EndDrag事件实现，例如在PANEL上的LABEL：

var xpanel,ypanel,xlabel,ylabel:integer;

PANEL的MouseMove事件：xpanel:=x;ypanel:=y;

PANEL的DragOver事件：xpanel:=x;ypanel:=y;

LABEL的MouseMove事件：xlabel:=x;ylabel:=y;

LABEL的EndDrag事件：label.left:=xpanel-xlabel;label.top:=ypanel-ylabel;

◇[DELPHI]取得WINDOWS目录

uses shellapi;

var windir:array[0..255] of char;

getwindowsdirectory(windir,sizeof(windir));

或者从注册表中读取，位置：

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion

SystemRoot键，取得如：C:\WINDOWS

◇[DELPHI]在form或其他容器上画线

var x,y:array [0..50] of integer;

canvas.pen.color:=clred;

canvas.pen.style:=psDash;

form1.canvas.moveto(trunc(x[i]),trunc(y[i]));

form1.canvas.lineto(trunc(x[j]),trunc(y[j]));

◇[DELPHI]字符串列表使用

var tips:tstringlist;

tips:=tstringlist.create;

tips.loadfromfile('filename.txt');

edit1.text:=tips[0];

tips.add('last line addition string');

tips.insert(1,'insert string at NO 2 line');

tips.savetofile('newfile.txt');

tips.free;

◇[DELPHI]简单的剪贴板操作

richedit1.selectall;

richedit1.copytoclipboard;

richedit1.cuttoclipboard;

edit1.pastefromclipboard;

◇[DELPHI]关于文件、目录操作

Chdir('c:\abcdir');转到目录

Mkdir('dirname');建立目录

Rmdir('dirname');删除目录

GetCurrentDir;//取当前目录名，无'\'

Getdir(0,s);//取工作目录名s:='c:\abcdir';

Deletfile('abc.txt');//删除文件

Renamefile('old.txt','new.txt');//文件更名

ExtractFilename(filelistbox1.filename);//取文件名

ExtractFileExt(filelistbox1.filename);//取文件后缀

◇[DELPHI]处理文件属性

attr:=filegetattr(filelistbox1.filename);

if (attr and faReadonly)=faReadonly then ... //只读

if (attr and faSysfile)=faSysfile then ... //系统

if (attr and faArchive)=faArchive then ... //存档

if (attr and faHidden)=faHidden then ... //隐藏

◇[DELPHI]执行程序外文件

WINEXEC//调用可执行文件

winexec('command.com /c copy *.* c:\',SW_Normal);

winexec('start abc.txt');

ShellExecute或ShellExecuteEx//启动文件关联程序

function executefile(const filename,params,defaultDir:string;showCmd:integer):THandle;

ExecuteFile('C:\abc\a.txt','x.abc','c:\abc\',0);

ExecuteFile('http://tingweb.yeah.net','','',0);

ExecuteFile('mailto:tingweb@wx88.net','','',0);

◇[DELPHI]取得系统运行的进程名

var hCurrentWindow:HWnd;szText:array[0..254] of char;

begin

hCurrentWindow:=Getwindow(handle,GW_HWndFrist);

while hCurrentWindow <> 0 do

begin

if Getwindowtext(hcurrnetwindow,@sztext,255)>0 then listbox1.items.add(strpas(@sztext));

hCurrentWindow:=Getwindow(hCurrentwindow,GW_HWndNext);

end;

◇[DELPHI]关于汇编的嵌入

Asm End;

可以任意修改EAX、ECX、EDX；不能修改ESI、EDI、ESP、EBP、EBX。

◇[DELPHI]关于类型转换函数

FloatToStr//浮点转字符串

FloatToStrF//带格式的浮点转字符串

IntToHex//整数转16进制

TimeToStr

DateToStr

DateTimeToStr

FmtStr//按指定格式输出字符串

formatDateTime('YYYY-MM-DD,hh-mm-ss',DATE);

◇[DELPHI]字符串的过程和函数

Insert(obj,target,pos);//字符串target插入在pos的位置。如插入结果大于target最大长度，多出字符将被截掉。如Pos在255以外，会产生运行错。例如，st:='Brian'，则Insert（'OK',st,2）会使st变为'BrOKian'。

Delete(st,pos,Num);//从st串中的pos（整型）位置开始删去个数为Num（整型）个字符的子字串。例如，st:='Brian'，则Delete(st,3,2)将变为Brn。

Str(value,st);//将数值value（整型或实型）转换成字符串放在st中。例如，a=2.5E4时，则str(a:10,st)将使st的值为' 25000'。

Val(st,var,code);//把字符串表达式st转换为对应整型或实型数值，存放在var中。St必须是一个表示数值的字符串，并符合数值常数的规则。在转换过程中，如果没有检测出错误，变量code置为0，否则置为第一个出错字符的位置。例如，st:=25.4E3,x是一个实型变量，则val(st,x,code)将使X值为25400，code值为0。

Copy(st.pos.num);//返回st串中一个位置pos（整型）处开始的，含有num（整型）个字符的子串。如果pos大于st字符串的长度，那就会返回一个空串，如果pos在255以外，会引起运行错误。例如，st:='Brian'，则Copy(st,2,2)返回'ri'。

Concat(st1,st2,st3……,stn);//把所有自变量表示出的字符串按所给出的顺序连接起来，并返回连接后的值。如果结果的长度255，将产生运行错误。例如，st1:='Brian',st2:=' ',st3:='Wilfred'，则Concat(st1,st2,st3)返回'Brian Wilfred'。

Length(st);//返回字符串表达式st的长度。例如，st:='Brian'，则Length(st)返回值为5。

Pos(obj,target);//返回字符串obj在目标字符串target的第一次出现的位置，如果target没有匹配的串，Pos函数的返回值为0。例如，target:='Brian Wilfred'，则Pos('Wil',target)的返回值是7，Pos('hurbet',target)的返回值是0。

◇[DELPHI]关于处理注册表

uses Registry;

var reg:Tregistry;

reg:=Tregistry.create;

reg.rootkey:='HKey_Current_User';

reg.openkey('Control Panel\Desktop',false);

reg.WriteString('Title Wallpaper','0');

reg.writeString('Wallpaper',filelistbox1.filename);

reg.closereg;

reg.free;

◇[DELPHI]关于键盘常量名

VK_BACK/VK_TAB/VK_RETURN/VK_SHIFT/VK_CONTROL/VK_MENU/VK_PAUSE/VK_ESCAPE

/VK_SPACE/VK_LEFT/VK_RIGHT/VK_UP/VK_DOWN

F1--F12：$70(112)--$7B(123)

A-Z：$41(65)--$5A(90)

0-9：$30(48)--$39(57)

◇[DELPHI]初步判断程序母语

DELPHI软件的DOS提示：This Program Must Be Run Under Win32.

VC++软件的DOS提示：This Program Cannot Be Run In DOS Mode.

◇[DELPHI]操作Cookie

response.cookies("name").domain:='http://www.086net.com';

with response.cookies.add do

begin

name:='username';

value:='username';

end

◇[DELPHI]增加到文档菜单连接

uses shellapi,shlOBJ;

shAddToRecentDocs(shArd_path,pchar(filepath));//增加连接

shAddToRecentDocs(shArd_path,nil);//清空

◇[杂类]备份智能ABC输入法词库

windows\system\user.rem

windows\system\tmmr.rem

◇[DELPHI]判断鼠标按键

if GetAsyncKeyState(VK_LButton)<>0 then ... //左键

if GetAsyncKeyState(VK_MButton)<>0 then ... //中键

if GetAsyncKeyState(VK_RButton)<>0 then ... //右键

◇[DELPHI]设置窗体的最大显示

onformCreate事件

self.width:=screen.width;

self.height:=screen.height;

◇[DELPHI]按键接受消息

OnCreate事件中处理：Application.OnMessage:=MyOnMessage;

procedure Tform1.MyOnMessage(var MSG:TMSG;var Handle:Boolean);

begin

if msg.message=256 then ... //ANY键

if msg.message=112 then ... //F1

if msg.message=113 then ... //F2

end;

◇[杂类]隐藏共享文件夹

共享效果：可访问，但不可见（在资源管理、网络邻居中）

取共享名为：direction$

访问：//computer/dirction/

◇[Java Script]Java Script网页常用效果

网页60秒定时关闭

settimeout('window.close();',60000)

--></script>

关闭窗口

定时转URL

设为首页

收藏本站

加入频道

◇[DELPHI]随机产生文本色

randomize;//随机种子

memo1.font.color:=rgb(random(255),random(255),random(255));

◇[DELPHI]DELPHI5 UPDATE升级补丁序列号

1000003185

90X25fx0

◇[DELPHI]文件名的非法字符过滤

for i:=1 to length(s) do

if s[i] in ['\','/',':','*','?','<','>','|'] then

◇[DELPHI]转换函数的定义及说明

datetimetofiledate (datetime:Tdatetime):longint; 将Tdatetime格式的日期时间值转换成DOS格式的日期时间值

datetimetostr (datetime:Tdatetime):string; 将Tdatatime格式变量转换成字符串，如果datetime参数不包含日期值，返回字符串日期显示成为00/00/00，如果datetime参数中没有时间值，返回字符串中的时间部分显示成为00：00：00 AM

datetimetostring (var result string;

const format:string;

datetime:Tdatetime); 根据给定的格式字符串转换时间和日期值，result为结果字符串，format为转换格式字符串，datetime为日期时间值

datetostr (date:Tdatetime) 使用shortdateformat全局变量定义的格式字符串将date参数转换成对应的字符串

floattodecimal (var result:Tfloatrec;value:

extended;precision,decimals:

integer); 将浮点数转换成十进制表示

floattostr (value:extended):string 将浮点数value转换成字符串格式，该转换使用普通数字格式，转换的有效位数为15位。

floattotext (buffer:pchar;value:extended;

format:Tfloatformat;precision,

digits:integer):integer; 用给定的格式、精度和小数将浮点值value转换成十进制表示形式，转换结果存放于buffer参数中，函数返回值为存储到buffer中的字符位数，buffer是非0结果的字符串缓冲区。

floattotextfmt (buffer:pchar;value:extended;

format:pchar):integer 用给定的格式将浮点值value转换成十进制表示形式，转换结果存放于buffer参数中，函数返回值为存储到buffer中的字符位数。

inttohex (value:longint;digits:integer):

string; 将给定的数值value转换成十六进制的字符串。参数digits给出转换结果字符串包含的数字位数。

inttostr (value:longint):string 将整数转换成十进制形式字符串

strtodate (const S:string):Tdatetime 将字符串转换成日期值，S必须包含一个合法的格式日期的字符串。

strtodatetime (const S:string):Tdatetime 将字符串S转换成日期时间格式，S必须具有MM/DD/YY HH：MM：SS[AM|PM]格式，其中日期和时间分隔符与系统时期时间常量设置相关。如果没有指定AM或PM信息，表示使用24小时制。

strtofloat (const S:string):extended; 将给定的字符串转换成浮点数，字符串具有如下格式：

[+|-]nnn…[.]nnn…[<+|-><E|e><+|->nnnn]

strtoint (const S:string):longint 将数字字符串转换成整数，字符串可以是十进制或十六进制格式，如果字符串不是一个合法的数字字符串，系统发生ECONVERTERROR异常

strtointdef (const S:string;default:

longint):longint; 将字符串S转换成数字，如果不能将S转换成数字，strtointdef函数返回参数default的值。

strtotime (const S:string):Tdatetime 将字符串S转换成TDATETIME值，S具有HH：MM：SS[AM|PM]格式，实际的格式与系统的时间相关的全局变量有关。

timetostr (time:Tdatetime):string; 将参数TIME转换成字符串。转换结果字符串的格式与系统的时间相关常量的设置有关。

◇[DELPHI]程序不出现在ALT+CTRL+DEL

在implementation后添加声明:

function RegisterServiceProcess(dwProcessID, dwType: Integer): Integer; stdcall; external 'KERNEL32.DLL';

RegisterServiceProcess(GetCurrentProcessID, 1);//隐藏

RegisterServiceProcess(GetCurrentProcessID, 0);//显示

用ALT+DEL+CTRL看不见

◇[DELPHI]程序不出现在任务栏

uses windows

var

Extendedstyle : Integer;

begin

Application.Initialize;

//==============================================================

Extendedstyle := GetWindowLong (Application.Handle, GWL_EXstyle);

SetWindowLong(Application.Handle, GWL_EXstyle, Extendedstyle OR WS_EX_TOOLWINDOW

AND NOT WS_EX_APPWINDOW);

//===============================================================

Application.Createform(Tform1, form1);

Application.Run;

end.

◇[DELPHI]如何判断拨号网络是开还是关

if GetSystemMetrics(SM_NETWORK) AND $01 = $01 then

showmessage('在线!')

else showmessage('不在线!');

◇[DELPHI]实现IP到域名的转换

function GetDomainName(Ip:string):string;

var

pH:PHostent;

data:twsadata;

ii:dword;

begin

WSAStartup($101, Data);

ii:=inet_addr(pchar(ip));

pH:=gethostbyaddr(@ii,sizeof(ii),PF_INET);

if (ph<>nil) then

result:=pH.h_name

else

result:='';

WSACleanup;

end;

◇[DELPHI]处理“右键菜单”方法

var

reg: TRegistry;

begin

reg := TRegistry.Create;

reg.RootKey:=HKEY_CLASSES_ROOT;

reg.OpenKey('*\shell\check\command', true);

reg.WriteString('', '"' + application.ExeName + '" "%1"');

reg.CloseKey;

reg.OpenKey('*\shell\diary', false);

reg.WriteString('', '操作(&C)');

reg.CloseKey;

reg.Free;

showmessage('DONE!');

end;

◇[DELPHI]发送虚拟键值ctrl V

procedure sendpaste;

begin

keybd_event(VK_Control, MapVirtualKey(VK_Control, 0), 0, 0);

keybd_event(ord('V'), MapVirtualKey(ord('V'), 0), 0, 0);

keybd_event(ord('V'), MapVirtualKey(ord('V'), 0), KEYEVENTF_KEYUP, 0);

keybd_event(VK_Control, MapVirtualKey(VK_Control, 0), KEYEVENTF_KEYUP, 0);

end;

◇[DELPHI]当前的光驱的盘符

procedure getcdrom(var cd:char);

var

str:string;

drivers:integer;

driver:char;

i,temp:integer;

begin

drivers:=getlogicaldrives;

temp:=(1 and drivers);

for i:=0 to 26 do

begin

if temp=1 then

begin

driver:=char(i+integer('a'));

str:=driver+':';

if getdrivetype(pchar(str))=drive_cdrom then

begin

cd:=driver;

exit;

end;

drivers:=(drivers shr 1);

temp:=(1 and drivers);

end;

◇[DELPHI]字符的加密与解密

function cryptstr(const s:string; stype: dword):string;

var

i: integer;

fkey: integer;

begin

result:='';

case stype of

0: setpass;

begin

randomize;

fkey := random($ff);

for i:=1 to length(s) do

result := result+chr( ord(s[i]) xor i xor fkey);

result := result + char(fkey);

end;

1: getpass

begin

fkey := ord(s[length(s)]);

for i:=1 to length(s) - 1 do

result := result+chr( ord(s[i]) xor i xor fkey);

end;

□◇[DELPHI]向其他应用程序发送模拟键

var

h: THandle;

begin

h := FindWindow(nil, '应用程序标题');

PostMessage(h, WM_KEYDOWN, VK_F9, 0);//发送F9键

end;

□◇[DELPHI]DELPHI 支持的DAO数据格式

td.Fields.Append(td.CreateField ('dbBoolean',dbBoolean,0));

td.Fields.Append(td.CreateField ('dbByte',dbByte,0));

td.Fields.Append(td.CreateField ('dbInteger',dbInteger,0));

td.Fields.Append(td.CreateField ('dbLong',dbLong,0));

td.Fields.Append(td.CreateField ('dbCurrency',dbCurrency,0));

td.Fields.Append(td.CreateField ('dbSingle',dbSingle,0));

td.Fields.Append(td.CreateField ('dbDouble',dbDouble,0));

td.Fields.Append(td.CreateField ('dbDate',dbDate,0));

td.Fields.Append(td.CreateField ('dbBinary',dbBinary,0));

td.Fields.Append(td.CreateField ('dbText',dbText,0));

td.Fields.Append(td.CreateField ('dbLongBinary',dbLongBinary,0));

td.Fields.Append(td.CreateField ('dbMemo',dbMemo,0));

td.Fields['ID'].Set_Attributes(dbAutoIncrField);//自增字段

□◇[DELPHI]DELPHI配置MS SQL 7和BDE步骤

第一步，配置ODBC：

先在ODBC 中设数据源，安装过SQL Server7.0 后,ODBC中有一项"系统DSN"应该有两项

数据源，一个是MQIS，一个是LocalSever，任选一个选后点击配置按钮，不知你的SQL7.0

是不是安装在本地机器上，如果是的话直接进行下一步，如果不是，在服务器一栏中填上

Server,然后进行下一步，填写登录ID 和密码（登录ID，和密码是在SQL7.0中的用户选项

中设的）。

第二步，配置BDE:

打开Delphi的BDE，然后点击MQIS 或 LocalServer，就会提示用户名和密码，这和

ODBC的用户名和密码是一样的，填上就行了。

第三步，配置程序：

如果用的是TTable，就在TTable的DatabaseName中选择MQIS 或LocalServer,然后在

TableName中选择Sale就行了，然后将Active改为True,Delphi弹出提示对话，填入用户

名和密码。

如果用的是TQuery,在TQuery上点击右键，再击"SQL Builder"，这是以界面方式配置

SQL语句，或者在TQuery的SQL中填入SQL语句。最后，别忘了将Active改为True。

在运行也可能配置TQuery,具体见Delphi帮助。

□◇[DELPHI]得到图像上某一点的RGB值

procedure Tform1.Image1MouseDown(Sender: TObject; Button: TMouseButton;

Shift: TShiftState; X, Y: Integer);

var

red,green,blue:byte ;

i:integer;

begin

i:= image1.Canvas.Pixels[x,y];

Blue:= GetBvalue(i);

Green:= GetGvalue(i):

Red:= GetRvalue(i);

Label1.Caption:=inttostr(Red);

Label2.Caption:=inttostr(Green);

Label3.Caption:=inttostr(Blue);

end;

□◇[DELPHI]关于日期格式分解转换

var year,month,day:word;now2:Tdatatime;

now2:=date();

decodedate(now2,year,month,day);

lable1.Text :=inttostr(year)+'年'+inttostr(month)+'月'+inttostr(day)+'日';

◇[DELPHI]如何判断当前网络连接方式

判断结果是MODEM、局域网或是代理服务器方式。

uses wininet;

Function ConnectionKind :boolean;

var flags: dword;

begin

Result := InternetGetConnectedState(@flags, 0);

if Result then

begin

if (flags and INTERNET_CONNECTION_MODEM) = INTERNET_CONNECTION_MODEM then

begin

showmessage('Modem');

end;

if (flags and INTERNET_CONNECTION_LAN) = INTERNET_CONNECTION_LAN then

begin

showmessage('LAN');

end;

if (flags and INTERNET_CONNECTION_PROXY) = INTERNET_CONNECTION_PROXY then

begin

showmessage('Proxy');

end;

if (flags and INTERNET_CONNECTION_MODEM_BUSY)=INTERNET_CONNECTION_MODEM_BUSY then

begin

showmessage('Modem Busy');

end;

◇[DELPHI]如何判断字符串是否是有效EMAIL地址

function IsEMail(EMail: String): Boolean;

var s: String;ETpos: Integer;

begin

ETpos:= pos('@', EMail);

if ETpos > 1 then

begin

s:= copy(EMail,ETpos+1,Length(EMail));

if (pos('.', s) > 1) and (pos('.', s) < length(s)) then

Result:= true else Result:= false;

end

else

Result:= false;

end;

◇[DELPHI]判断系统是否连接INTERNET

需要引入URL.DLL中的InetIsOffline函数。

函数申明为：

function InetIsOffline(Flag: Integer): Boolean; stdcall; external 'URL.DLL';

然后就可以调用函数判断系统是否连接到INTERNET

if InetIsOffline(0) then ShowMessage('not connected!')

else ShowMessage('connected!');

该函数返回TRUE如果本地系统没有连接到INTERNET。

附：

大多数装有IE或OFFICE97的系统都有此DLL可供调用。

InetIsOffline

BOOL InetIsOffline(

DWORD dwFlags,

);

◇[DELPHI]简单地播放和暂停WAV文件

uses mmsystem;

function PlayWav(const FileName: string): Boolean;

begin

Result := PlaySound(PChar(FileName), 0, SND_ASYNC);

end;

procedure StopWav;

var

buffer: array[0..2] of char;

begin

buffer[0] := #0;

PlaySound(Buffer, 0, SND_PURGE);

end;

◇[DELPHI]取机器BIOS信息

with Memo1.Lines do

begin

Add('MainBoardBiosName:'+^I+string(Pchar(Ptr($FE061))));

Add('MainBoardBiosCopyRight:'+^I+string(Pchar(Ptr($FE091))));

Add('MainBoardBiosDate:'+^I+string(Pchar(Ptr($FFFF5))));

Add('MainBoardBiosSerialNo:'+^I+string(Pchar(Ptr($FEC71))));

end;

◇[DELPHI]网络下载文件

uses UrlMon;

function DownloadFile(Source, Dest: string): Boolean;

begin

try

Result := UrlDownloadToFile(nil, PChar(source), PChar(Dest), 0, nil) = 0;

except

Result := False;

end;

if DownloadFile('http://www.borland.com/delphi6.zip, 'c:\kylix.zip') then

ShowMessage('Download succesful')

else ShowMessage('Download unsuccesful')

◇[DELPHI]解析服务器IP地址

uses winsock

function IPAddrToName(IPAddr : String): String;

var

SockAddrIn: TSockAddrIn;

HostEnt: PHostEnt;

WSAData: TWSAData;

begin

WSAStartup($101, WSAData);

SockAddrIn.sin_addr.s_addr:= inet_addr(PChar(IPAddr));

HostEnt:= gethostbyaddr(@SockAddrIn.sin_addr.S_addr, 4, AF_INET);

if HostEnt<>nil then result:=StrPas(Hostent^.h_name) else result:='';

end;

◇[DELPHI]取得快捷方式中的连接

function ExeFromLink(const linkname: string): string;

var

FDir,

FName,

ExeName: PChar;

z: integer;

begin

ExeName:= StrAlloc(MAX_PATH);

FName:= StrAlloc(MAX_PATH);

FDir:= StrAlloc(MAX_PATH);

StrPCopy(FName, ExtractFileName(linkname));

StrPCopy(FDir, ExtractFilePath(linkname));

z:= FindExecutable(FName, FDir, ExeName);

if z > 32 then

Result:= StrPas(ExeName)

else

Result:= '';

StrDispose(FDir);

StrDispose(FName);

StrDispose(ExeName);

end;

◇[DELPHI]控制TCombobox的自动完成

{'Sorted' property of the TCombobox to true }

var lastKey: Word; //全局变量

//TCombobox的OnChange事件

procedure Tform1.AutoCompleteChange(Sender: TObject);

var

SearchStr: string;

retVal: integer;

begin

SearchStr := (Sender as TCombobox).Text;

if lastKey <> VK_BACK then // backspace: VK_BACK or $08

begin

retVal := (Sender as TCombobox).Perform(CB_FINDSTRING, -1, LongInt(PChar(SearchStr)));

if retVal > CB_Err then

begin

(Sender as TCombobox).ItemIndex := retVal;

(Sender as TCombobox).SelStart := Length(SearchStr);

(Sender as TCombobox).SelLength :=

(Length((Sender as TCombobox).Text) - Length(SearchStr));

end; // retVal > CB_Err

end; // lastKey <> VK_BACK

lastKey := 0; // reset lastKey

end;

//TCombobox的onKeyDown事件

procedure Tform1.AutoCompleteKeyDown(Sender: TObject; var Key: Word;

Shift: TShiftState);

begin

lastKey := Key;

end;

◇[DELPHI]如何清空一个目录

function EmptyDirectory(TheDirectory :String ; Recursive : Boolean) :

Boolean;

var

SearchRec : TSearchRec;

Res : Integer;

begin

Result := False;

TheDirectory := NormalDir(TheDirectory);

Res := FindFirst(TheDirectory + '*.*', faAnyFile, SearchRec);

try

while Res = 0 do

begin

if (SearchRec.Name <> '.') and (SearchRec.Name <> '..') then

begin

if ((SearchRec.Attr and faDirectory) > 0) and Recursive

then begin

EmptyDirectory(TheDirectory + SearchRec.Name, True);

RemoveDirectory(PChar(TheDirectory + SearchRec.Name));

end

else begin

DeleteFile(PChar(TheDirectory + SearchRec.Name))

end;

Res := FindNext(SearchRec);

end;

Result := True;

finally

FindClose(SearchRec.FindHandle);

end;

◇[DELPHI]安装程序如何添加到Uninstall列表

操作注册表，如下：

1.在HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall键下建立一个主键，名称任意。

例HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\MyUninstall

2.在HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\MyUnistall下键两个串值，

这两个串值的名称是特定的：DisplayName和UninstallString。

3.给串DisplayName赋值为显示在“删除应用程序列表”中的名称，如'Aiming Uninstall one';

给串UninstallString赋值为执行的删除命令，如 C:\WIN97\uninst.exe -f"C:\TestPro\aimTest.isu"

◇[DELPHI]截获WM_QUERYENDSESSION关机消息

type

Tform1 = class(Tform)

procedure WMQueryEndSession(var Message: TWMQueryEndSession); message WM_QUERYENDSESSION;

procedure CMEraseBkgnd(var Message:TWMEraseBkgnd);Message WM_ERASEBKGND;

private

{ Private declarations }

public

{ Public declarations }

end;

procedure Tform1.WMQueryEndSession(var Message: TWMQueryEndSession);

begin

Showmessage('computer is about to shut down');

end;

◇[DELPHI]获取网上邻居

procedure getnethood();//NT做服务器，WIN98上调试通过。

var

a,i:integer;

errcode:integer;

netres:array[0..1023] of netresource;

enumhandle:thandle;

enumentries:dword;

buffersize:dword;

s:string;

mylistitems:tlistitems;

mylistitem:tlistitem;

alldomain:tstrings;

begin //listcomputer is a listview to list all computers;controlcenter is a form.

alldomain:=tstringlist.Create ;

with netres[0] do begin

dwscope :=RESOURCE_GLOBALNET;

dwtype :=RESOURCETYPE_ANY;

dwdisplaytype :=RESOURCEDISPLAYTYPE_DOMAIN;

dwusage :=RESOURCEUSAGE_CONTAINER;

lplocalname :=nil;

lpremotename :=nil;

lpcomment :=nil;

lpprovider :=nil;

end; // 获取所有的域

errcode:=wnetopenenum(RESOURCE_GLOBALNET,RESOURCETYPE_ANY,RESOURCEUSAGE_CONTAINER,@netres[0],enumhandle);

if errcode=NO_ERROR then begin

enumentries:=1024;

buffersize:=sizeof(netres);

errcode:=wnetenumresource(enumhandle,enumentries,@netres[0],buffersize);

end;

a:=0;

mylistitems :=controlcenter.lstcomputer.Items ;

mylistitems.Clear ;

while (string(netres[a].lpprovider)<>'') and (errcode=NO_ERROR) do

begin

alldomain.Add (netres[a].lpremotename);

a:=a+1;

end;

wnetcloseenum(enumhandle);

// 获取所有的计算机

mylistitems :=controlcenter.lstcomputer.Items ;

mylistitems.Clear ;

for i:=0 to alldomain.Count-1 do

begin

with netres[0] do begin

dwscope :=RESOURCE_GLOBALNET;

dwtype :=RESOURCETYPE_ANY;

dwdisplaytype :=RESOURCEDISPLAYTYPE_SERVER;

dwusage :=RESOURCEUSAGE_CONTAINER;

lplocalname :=nil;

lpremotename :=pchar(alldomain[i]);

lpcomment :=nil;

lpprovider :=nil;

end;

ErrCode:=WNetOpenEnum(RESOURCE_GLOBALNET,RESOURCETYPE_ANY,RESOURCEUSAGE_CONTAINER,@netres[0],EnumHandle);

if errcode=NO_ERROR then

begin

EnumEntries:=1024;

BufferSize:=SizeOf(NetRes);

ErrCode:=WNetEnumResource(EnumHandle,EnumEntries,@NetRes[0],BufferSize);

end;

a:=0;

while (string(netres[a].lpprovider)<>'') and (errcode=NO_ERROR) do

begin

mylistitem :=mylistitems.Add ;

mylistitem.ImageIndex :=0;

mylistitem.Caption :=uppercase(stringreplace(string(NetRes[a].lpremotename),'\\','',[rfReplaceAll]));

a:=a+1;

end;

wnetcloseenum(enumhandle);

end;

◇[DELPHI]获取某一计算机上的共享目录

procedure getsharefolder(const computername:string);

var

errcode,a:integer;

netres:array[0..1023] of netresource;

enumhandle:thandle;

enumentries,buffersize:dword;

s:string;

mylistitems:tlistitems;

mylistitem:tlistitem;

mystrings:tstringlist;

begin

with netres[0] do begin

dwscope :=RESOURCE_GLOBALNET;

dwtype :=RESOURCETYPE_DISK;

dwdisplaytype :=RESOURCEDISPLAYTYPE_SHARE;

dwusage :=RESOURCEUSAGE_CONTAINER;

lplocalname :=nil;

lpremotename :=pchar(computername);

lpcomment :=nil;

lpprovider :=nil;

end; // 获取根结点

errcode:=wnetopenenum(RESOURCE_GLOBALNET,RESOURCETYPE_DISK,RESOURCEUSAGE_CONTAINER,@netres[0],enumhandle);

if errcode=NO_ERROR then

begin

EnumEntries:=1024;

BufferSize:=SizeOf(NetRes);

ErrCode:=WNetEnumResource(EnumHandle,EnumEntries,@NetRes[0],BufferSize);

end;

wnetcloseenum(enumhandle);

a:=0;

mylistitems:=controlcenter.lstfile.Items ;

mylistitems.Clear ;

while (string(netres[a].lpprovider)<>'') and (errcode=NO_ERROR) do

begin

with mylistitems do

begin

mylistitem:=add;

mylistitem.ImageIndex :=4;

mylistitem.Caption :=extractfilename(netres[a].lpremotename);

end;

a:=a+1;

end;

◇[DELPHI]得到硬盘序列号

var SerialNum : pdword; a, b : dword; Buffer : array [0..255] of char;

begin

if GetVolumeInformation('c:\', Buffer, SizeOf(Buffer), SerialNum, a, b, nil, 0) then Label1.Caption := IntToStr(SerialNum^);

end;

1.关于MDI主窗体背景新解

在Form中添加Image控件

设BMP图象

name为 IMG_BK

在Foem的Create事件中写入

Self.brush.bitmap:=img_bk.picture.bitmap;

2.在标题栏处画VCL控件(一行解决问题!!!)

在 form 的onpaint 事件中

控件.pointto(getdc(0),left,top);

3 Edit 中只输入数字

SetWindowLong(Edit1.Handle, GWL_STYLE,

GetWindowLong(Edit1.Handle, GWL_STYLE) or

ES_NUMBER);

4.类似MDI方式新解

在要设置child的oncreate方式下写入:

self.parent:='要设置为mainform的Form';

5. 屏幕的Refresh(只需一行!)

RedrawWindow(0,nil,0,RDW_ERASE or RDW_INVALIDATE or RDW_ALLCHILDREN);

| |

--- ----

handle RGN(可刷新局部屏幕)

6.类似DOS下的CLS指令的WINDOWS指令!

paintdesktop(getdc(0));

7.扩展控件新功能

在编程中 ,我们经常要控制控件的动作,但该控件又没有提供该方法

这时 ,可通过发消息给该控件 ,以达到我们的目的!

如:

button1.perform(wm_keydown,13,0);

listbox1.perform(wm_vscroll,sb_linedown,0);

等等可少去重载之苦!!!!!

8.闪烁标题如打印机超时(一行)

form 放一timer 控件

time 事件中写入 ;

flashwindow(application.handle,true);

9.在桌面上加个VCL控件!(不是画的,不可refresh)

windows.setparent(控件.handle,0);

注: 想放哪都行 (如'开始处状态栏')

10.关于 '类似MDI方式新解(一行就行!!!!)'的修正

windows.setparent(self.handle,'要设置为mainform的Form');

11 普通Form象MDI中mainform始终在最底层

SetActiveWindow(0);

或 SetwindowPos(...);

12 执行下列语句开始Windows屏幕保护程序

SendMessage(HWND_BROADCAST,WM_SYSCOMMAND,SC_SCREENSAVE,0);

13 button 的 caption 多行显示：

SetWindowLong(Button1.handle, GWL_STYLE,

GetWindowlong(Button1.Handle, GWL_STYLE) or

BS_MULTILINE);

必要时加上 Button1.Invalidate;

14.整死windows98 :)

asm int $19 end

Q: 怎么来改变ListBox的字体呢？就修改其中的一行。

A: 先把ListBox1.Style 设成lbOwnerDrawFixed

然后在 OnDrawItem 事件下写下如下代码

procedure TForm1.ListBox1DrawItem(Control: TWinControl; Index: Integer;

Rect: TRect; State: TOwnerDrawState);

var

Offset: Integer;

begin

Offset := 2;

with (Control as TListBox).Canvas do begin

FillRect(Rect);

if Index = 2 then begin

Font.Name := 'Fixedsys';

Font.Color := clRed;

Font.Size := 12;

end else begin

Font.Name := 'Arial';

Font.Color := clBlack;

Font.Size := 8;

end;

if odSelected in State then begin

Font.Color := clWhite;

end;

TextOut(Rect.Left + Offset, Rect.Top, (Control as TListBox).Items[Index]);

end;

Q：怎么在RichEdit里面插入图片？

A: 请到这里来看看会找到答案

http://www.undu.com/Articles/991107c.html

Q：怎么才能目录呢？

A：我来。

uses ShellAPI;

procedure DeleteFiles(Source: string);

var

FO: TShFileOpStruct;

begin

FillChar(FO,SizeOf(FO),#0);

FO.Wnd := Form1.Handle;

FO.wFunc := FO_DELETE;

FO.pFrom := PChar(Source);

ShFileOperation(FO);

end;

procedure EmptyDirectory(Path: String);

begin

if DirectoryExists(Path) then

begin

DeleteFiles(Path+'\*');

end

else

ForceDirectories(Path);

end;

Q:如何映射网络驱动器？

比如我要把\Serversys映射为F盘。我需要一个函数比如

给出输入参数为\serversyshomebruno给我的返回值是F:\home\bruno

A：

Function UNCToDrive(UNCPath: STring): STring;

var

DriveNum: Integer;

DriveChar: Char;

DriveBits: set of 0..25;

StartSTr,TestStr: STring;

begin

result := UNCPath;

StartSTr := UNCPath;

Integer(DriveBits) := GetLogicalDrives;

for DriveNum := 0 to 25 do

begin

if (DriveNum in DriveBits) then begin

DriveChar := Char(DriveNum + Ord('A'));

TestSTr := ExpandUNCFileName(DriveChar+':\');

If TEstStr <> '' then

If Pos(Uppercase(TestSTr),Uppercase(STartSTr)) > 0 then

begin

Delete(StartSTr,1,Length(TestSTr));

result := DriveChar+':\'+StartSTr;

break;

end;

Q：我有一些特殊语言的字体来用，它们存储在我的EXE文件里，但是两点。

* 我不想放到font文件夹里

* 我不想从EXE文件里面提取出来

如果可能，请告诉我。

因为，我的字体是自己做的不是windows自带的，我想保护自己的东西。

A:不太可能，必须提取出来。你可以使用这个保护过程来保护你的文件不被修改和删除。

在EXE执行的时候把字体放到临时文件夹里，结束的时候删除它。

function ProtectFile(sFilename : string) : hFile;

var

hf: hFile;

lwHFileSize, lwFilesize: longword;

ofs : TOFStruct;

begin

if FileExists(sFilename) then

begin

hf := OpenFile(pchar(sFilename), ofs, OF_READ or OF_WRITE or OF_SHARE_EXCLUSIVE);

if hf <> 0 then

begin

lwFilesize := GetFileSize(hf, @lwHFileSize);

if LockFile(hf, 0, 0, lwFilesize, lwHFilesize) then

Result := hf else Result := 0;

end

else Result := 0;

end

else Result := 0;

end;

//..

var

ResS: TResourceStream;

TempPath: array [0..MAX_PATH] of Char;

TempDir: string;

begin

GetTempPath(Sizeof(TempPath), TempPath);

TempDir := StrPas(Path);

ResS := TResourceStream.Create(hInstance, 'SOME_FONT', 'RT_FONT');

ResS.SavetoFile(TempDir+'some_font.ttf');

ResS.Free;

AddFontResource(TempDir+'some_font.ttf');

SendMessage(HWND_BROADCAST, WM_FONTCHANGE, 0, 0);

ProtectFile(TempDir+'some_font.ttf');

end;

Q：如何得到当前的ProgramFiles得路径？

A：用读写注册表的方法就可以做到。

代码如下：

uses registry;

procedure TForm1.Button1Click(Sender: TObject);

var

reg:TRegistry;

begin

reg:=TRegistry.Create;

reg.RootKey:=HKEY_LOCAL_MACHINE;

if reg.OpenKey('SOFTWARE\Microsoft\Windows\CurrentVersion',false) then

begin

edit1.Text:=reg.ReadString('ProgramFilesDir');

reg.CloseKey;

reg.Free;

end;

Q:如何在Jpg图像上写上字？

A：这里有个代码。

hmm, here's a sample with help of Bitmap, you can chance the brush style of canvas to bsClear to make the text transparent

uses

Jpeg;

procedure TForm1.Button1Click(Sender: TObject);

var

Bmp : TBitmap;

Jpg : TJpegImage;

begin

try

Bmp := TBitmap.Create;

Jpg := TjpegImage.Create;

Jpg.LoadFromFile('c:\img.jpg');

Bmp.Assign(Jpg);

Bmp.Canvas.Brush.Style := bsClear;

Bmp.Canvas.Font.Color := clYellow;

Bmp.Canvas.TextOut(10,10,'Hello World');

Jpg.Assign(Bmp);

Jpg.SaveToFile('c:\img2.jpg');

finally

bmp.Free;

jpg.Free;

end;

Q：怎么用delphi修改文件的时间呢？

在windows下，属性里面有三个日起，创建，修改，存储。我怎么来修改啊？

A：Here is the excerpt from the Jedi Code Library. If it is not complete then get the JCL.

type

// indicates the file time to set, used by SetFileTimesHelper and SetDirTimesHelper

TFileTimes = (ftLastAccess, ftLastWrite, ftCreation);

function SetFileTimesHelper(const FileName: string; const DateTime: TDateTime; Times: TFileTimes): Boolean;

var

Handle: THandle;

FileTime: TFileTime;

SystemTime: TSystemTime;

begin

Result := False;

Handle := CreateFile(PChar(FileName), GENERIC_WRITE, FILE_SHARE_READ, nil,

OPEN_EXISTING, 0, 0);

if Handle <> INVALID_HANDLE_VALUE then

try

//SysUtils.DateTimeToSystemTime(DateTimeToLocalDateTime(DateTime), SystemTime);

SysUtils.DateTimeToSystemTime(DateTime, SystemTime);

if Windows.SystemTimeToFileTime(SystemTime, FileTime) then

begin

case Times of

ftLastAccess:

Result := SetFileTime(Handle, nil, @FileTime, nil);

ftLastWrite:

Result := SetFileTime(Handle, nil, nil, @FileTime);

ftCreation:

Result := SetFileTime(Handle, @FileTime, nil, nil);

end;

finally

CloseHandle(Handle);

end;

//--------------------------------------------------------------------------------------------------

function SetFileLastAccess(const FileName: string; const DateTime: TDateTime): Boolean;

begin

Result := SetFileTimesHelper(FileName, DateTime, ftLastAccess);

end;

//--------------------------------------------------------------------------------------------------

function SetFileLastWrite(const FileName: string; const DateTime: TDateTime): Boolean;

begin

Result := SetFileTimesHelper(FileName, DateTime, ftLastWrite);

end;

//--------------------------------------------------------------------------------------------------

function SetFileCreation(const FileName: string; const DateTime: TDateTime): Boolean;

begin

Result := SetFileTimesHelper(FileName, DateTime, ftCreation);

end;

google上的有关delphi得网址：

http://directory.google.com/Top/Computers/Programming/Languages/Delphi/?tc=1

yahoo上有关delphi得网址

http://dir.yahoo.com/Computers_and_Internet/Programming_and_Development/Languages/Delphi/

删掉程序自己的exe文件

procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);

var

F:TextFile;

begin

AssignFile(F,'delself.bat');

Rewrite(F);{F为TextFile类型}

WriteLn(F,'del '+ExtractFileName(Application.ExeName));

WriteLn(F,'del %0'); //删除自己delself.bat

CloseFile(F);

WinExec('delself.bat',SW_HIDE);

end;

if ord(s[9])>128 then

ShowMessage('该位置字符是汉字');

汉字是双字节的

更改系统时间格式：

var

str: string;

begin

str := 'yyyy-mm-dd';

if SetLocaleInfoa(LOCALE_SYSTEM_DEFAULT, LOCALE_SLONGDATE, PChar(str)) then

begin

showmessage('更改日期格式成功');

end;

休息一分钟：

var

I:integer;

begin

i:=gettickcount;

while (Gettickcount-i)<=10000 do

application.ProcessMessages;//保证消息循环

end;

取主文件名:

function retuFileName(const FileName: string): string;

var

I: Integer;

begin

I := LastDelimiter('.', FileName);

Result := Copy(FileName, 1, i-1);

end;

(1).按下ctrl和其它键之后发生一事件。

procedure TForm1.FormKeyDown(Sender: TObject; var Key: Word;

Shift: TShiftState);

begin

if (ssCtrl in Shift) and (key =67) then

showmessage('keydown Ctrl+C');

end;

(2).Dbgrid中用Enter键代替Tab键.

procedure TForm1.DBGrid1KeyPress(Sender: TObject; var Key: Char);

begin

if Key = #13 then

if ActiveControl = DBGrid1 then

begin

TDBGrid(ActiveControl).SelectedIndex := TDBGrid(ActiveControl).SelectedIndex + 1;

Key := #0;

end;

(3).Dbgrid中选择多行发生一事件。

procedure TForm1.Button1Click(Sender: TObject);

var

i:integer;

bookmarklist:Tbookmarklist;

bookmark:tbookmarkstr;

begin

bookmark:=adoquery1.Bookmark;

bookmarklist:=dbgrid1.SelectedRows;

try

begin

for i:=0 to bookmarklist.Count-1 do

begin

adoquery1.Bookmark:=bookmarklist[i];

with adoquery1 do

begin

edit;

fieldbyname('mdg').AsString:=edit2.Text;

post;

end;

finally

adoquery1.Bookmark:=bookmark;

end;

(4).Form的一个出现效果。

procedure TForm1.Button1Click(Sender: TObject);

var

r:thandle;

i:integer;

begin

for i:=1 to trunc(width/1.414) do

begin

r:=CreateEllipticRgn(trunc(width/2)-i,trunc(height/2)-i,trunc(width/2)+i,trunc(height/2)+i);

SetWindowRgn(handle,r,true);

Application.ProcessMessages;

sleep(1);

end;

(5).用Enter代替Tab在编辑框中移动隹点。

procedure TForm1.FormKeyPress(Sender: TObject; var Key: Char);

begin

if key=#13 then

begin

if not (Activecontrol is Tmemo) then

begin

key:=#0;

keybd_event(vk_tab,mapvirtualkey(vk_tab,0),0,0);

end;

(6).Progressbar加上色彩。

const

{$EXTERNALSYM PBS_MARQUEE}

PBS_MARQUEE = 08;

var

Form1: TForm1;

implementation

{$R *.dfm}

uses

CommCtrl;

procedure TForm1.Button1Click(Sender: TObject);

begin

// Set the Background color to teal

Progressbar1.Brush.Color := clTeal;

// Set bar color to yellow

SendMessage(ProgressBar1.Handle, PBM_SETBARCOLOR, 0, clYellow);

end;

(7).住点移动时编辑框色彩不同。

procedure TForm1.Edit1Enter(Sender: TObject);

begin

(sender as tedit).Color:=clred;

end;

procedure TForm1.Edit1Exit(Sender: TObject);

begin

(sender as tedit).Color:=clwhite;

end;

(8).备份和恢复

procedure TForm1.Button1Click(Sender: TObject);

begin

if OpenDialog1.Execute then

begin

try

adoconnection1.Connected:=False;

adoconnection1.ConnectionString:='Provider=SQLOLEDB.1;Persist Security Info=False;User ID=sa;Initial Catalog=master;Data Source=FRIEND-YOFZKSCO;'+

'Use Procedure for Prepare=1;Auto Translate=True;Packet Size=4096;Workstation ID=FRIEND-YOFZKSCO;Use Encryption for Data=False;Tag with column collation when possible=False';

adoconnection1.Connected:=True;

with adoQuery1 do

begin

Close;

SQL.Clear;

SQL.Add('Backup DataBase sfa to disk ='''+opendialog1.FileName+'''');

ExecSQL;

end;

except

ShowMessage('±?·Yê§°ü');

Exit;

end;

Application.MessageBox('1§?2?ú￡?êy?Y±?·Y3é1|','ìáê?',MB_OK + MB_ICONINFORMATION);

end;

procedure TForm1.Button2Click(Sender: TObject);

begin

if OpenDialog1.Execute then

begin

try

adoconnection1.Connected:=false;

adoconnection1.ConnectionString:='Provider=SQLOLEDB.1;Persist Security Info=False;User ID=sa;Initial Catalog=master;Data Source=FRIEND-YOFZKSCO;'+

'Use Procedure for Prepare=1;Auto Translate=True;Packet Size=4096;Workstation ID=FRIEND-YOFZKSCO;Use Encryption for Data=False;Tag with column collation when possible=False';

adoconnection1.Connected:=true;

with adoQuery1 do

begin

Close;

SQL.Clear;

SQL.Add('Restore DataBase sfa from disk ='''+opendialog1.FileName+'''');

ExecSQL;

end;

except

ShowMessage('???′ê§°ü');

Exit;

end;

Application.MessageBox('1§?2?ú￡?êy?Y???′3é1|','ìáê?',MB_OK + MB_ICONINFORMATION);

end;

(9).查找局域网上的sqlserver报务器。

uses Comobj;

procedure TForm1.Button1Click(Sender: TObject);

var

SQLServer:Variant;

ServerList:Variant;

i,nServers:integer;

sRetValue:String;

begin

SQLServer := CreateOleObject('SQLDMO.Application');

ServerList:= SQLServer.ListAvailableSQLServers;

nServers:=ServerList.Count;

for i := 1 to nservers do

ListBox1.Items.Add(ServerList.Item(i));

SQLServer:=NULL;

serverList:=NULL;

end;

(10).窗体打开时的淡入效果。

procedure TForm1.FormCreate(Sender: TObject);

begin

AnimateWindow (Handle, 400, AW_CENTER);

end;

(11).动态创建窗体。

procedure TForm1.Button1Click(Sender: TObject);

begin

try

form2:=Tform2.Create(self);

form2.ShowModal;

finally

form2.Free;

end;

procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);

begin

action:=cafree;

end;

procedure TForm1.FormDestroy(Sender: TObject);

begin

form1:=nil;

end;

(12).复制文件。

procedure TForm1.Button1Click(Sender: TObject);

begin

try

copyfileA(pchar('C:\AAA.txt'),pchar('D:\AAA.txt'),false);

except

showmessage('sfdsdf');

end;

(13).复制文件夹。

uses shellAPI;

procedure TForm1.Button1Click(Sender: TObject);

var

lpFileOp: TSHFileOpStruct;

begin

with lpFileOp do

begin

Wnd:=Self.Handle;

wfunc:=FO_COPY;

pFrom:=pchar('C:\AAA');

pTo:=pchar('D:\AAA');

fFlags:=FOF_ALLOWUNDO;

hNameMappings:=nil;

lpszProgressTitle:=nil;

fAnyOperationsAborted:=True;

end;

if SHFileOperation(lpFileOp)<>0 then

ShowMessage('删除失败');

end;

(14).改变Dbgrid的选定色。

procedure TForm1.DBGrid1DrawDataCell(Sender: TObject; const Rect: TRect;

Field: TField; State: TGridDrawState);

begin

if gdSelected in state then

SetBkColor(dbgrid1.canvas.handle,clgreen)

else

setbkcolor(dbgrid1.canvas.handle,clwhite);

dbgrid1.Canvas.TextRect(rect,0,0,field.AsString);

dbgrid1.Canvas.Textout(rect.Left,rect.Top,field.AsString);

end;

(15).检测系统是否已安装了ADO。

uses registry;

function Tform1.ADOInstalled:Boolean;

var

r:TRegistry;

s:string;

begin

r := TRegistry.create;

try

with r do

begin

RootKey := HKEY_CLASSES_ROOT;

OpenKey( '\ADODB.Connection\CurVer', false );

s := ReadString('');

if s <> '' then Result := True

else Result := False;

CloseKey;

end;

finally

r.free;

end;

procedure TForm1.Button1Click(Sender: TObject);

begin

if ADOInstalled then showmessage('this computer has installed ADO');

end;

(16).取利主机的ip地址。

uses winsock;

procedure TForm1.Button1Click(Sender: TObject);

var

IP:string;

IPstr:String;

buffer:array[1..32] of char;

i:integer;

WSData:TWSAdata;

Host:PHostEnt;

begin

if WSAstartup(2,WSData)<>0 then

begin

showmessage('WS2_32.DLL3?ê??ˉê§°ü.');

exit;

end;

try

if GetHostname(@buffer[1],32)<>0 then

begin

showmessage('??óDμ?μ??÷?ú??.');

exit;

end;

except

showmessage('??óD3é1|·μ???÷?ú??');

exit;

end;

Host:=GetHostbyname(@buffer[1]);

if Host=nil then

begin

showmessage('IPμ??·?a??.');

exit;

end

else

begin

edit2.Text:=Host.h_name;

edit3.Text:=chr(host.h_addrtype+64);

for i:=1 to 4 do

begin

IP:=inttostr(ord(host.h_addr^[i-1]));

if i<4 then

ipstr:=ipstr+IP+'.'

else

edit1.Text:=ipstr+ip;

end;

WSACleanup;

end;

(17).取得计算机名。

function tform1.get_name:string;

var ComputerName: PChar; size: DWord;

begin

GetMem(ComputerName,255);

size:=255;

if GetComputerName(ComputerName,size)=False then

result:=''

else

result:=ComputerName;

FreeMem(ComputerName);

end;

procedure TForm1.Button1Click(Sender: TObject);

begin

label1.Caption:=get_name;

end;

(18).取得硬盘序列号。

function tform1.GetHDSerialNumber: LongInt;

{$IFDEF WIN32}

var

pdw : pDWord;

mc, fl : dword;

{$ENDIF}

begin

{$IfDef WIN32}

New(pdw);

GetVolumeInformation('c:\',nil,0,pdw,mc,fl,nil,0);

Result := pdw^;

dispose(pdw);

{$ELSE}

Result := GetWinFlags;

{$ENDIF}

end;

procedure TForm1.Button1Click(Sender: TObject);

begin

edit1.Text:=inttostr(gethdserialnumber);

end;

(19).限定光标移动范围。

procedure TForm1.Button1Click(Sender: TObject);

var

rect1:trect;

begin

rect1:=button2.BoundsRect;

mapwindowpoints(handle,0,rect1,2);

clipcursor(@rect1);

end;

procedure TForm1.Button2Click(Sender: TObject);

var

screenrect:trect;

begin

screenrect:=rect(0,0,screen.Width,screen.Height);

clipcursor(@screenrect);

end;

(20).限制edit框只能输入数字。

procedure TForm1.Edit1KeyPress(Sender: TObject; var Key: Char);

begin

if not (key in ['0'..'9','.',#8]) then

begin

key:=#0;

Messagebeep(0);

end;

(21).dbgrid中根据任一条件某一格变色。

procedure TForm_main.DBGridEh1DrawColumnCell(Sender: TObject;

const Rect: TRect; DataCol: Integer; Column: TColumnEh;

State: TGridDrawState);

begin

if (trim(DataModule1.ADOQuery1.FieldByName('dczt').AsString)='OK') then

begin

if datacol=6 then

begin

DbGrideh1.Canvas.Brush.Color:=clGradientActiveCaption;

DbGrideh1.DefaultDrawColumnCell(Rect,datacol,column,state);

end;

(22).打开word文件。

procedure TfjfsglForm.SpeedButton4Click(Sender: TObject);

var

MSWord: Variant;

str:string;

begin

if trim(DataModule1.adoquery27.fieldbyname('fjmc').asstring)<>'' then

begin

str:=trim(DataModule1.ADOQuery27.fieldbyname('fjmc').AsString);

MSWord:= CreateOLEObject('Word.Application');//

MSWord.Documents.Open('d:\Program Files\Common Files\Sfa\'+str, True);//

MSWord.Visible:=1;//

str:='';

MSWord.ActiveDocument.Range(0, 0);//

MSWord.ActiveDocument.Range.InsertAfter(str);//?úWord?D???ó×?·?'Title'

MSWord.ActiveDocument.Range.InsertParagraphAfter;

end

else

showmessage('');

end;

(23).word文件传入和传出数据库。

uses IdGlobal;

procedure TdjhyForm.SpeedButton2Click(Sender: TObject);

var

sfilename:string;

function BlobContentTostring(const Filename:string):string;

begin

with Tfilestream.Create(filename,fmopenread) do

try

setlength(result,size);

read(pointer(result)^,size);

finally

free;

end;

begin

if opendialog1.Execute then

begin

sfilename:=opendialog1.FileName;

DataModule1.ADOQuery14.Edit;

DataModule1.ADOQuery14.FieldByName('word').AsString:=blobcontenttostring(sfilename);

DataModule1.ADOQuery14.Post;

end;

procedure TdjhyForm.SpeedButton1Click(Sender: TObject);

var

sfilename:string;

bs:Tadoblobstream;

begin

bs:=Tadoblobstream.Create(TBLOBfield(DataModule1.ADOQuery14.FieldByName('word')),bmread);

try

sfilename:=extractfilepath(application.ExeName)+trim(DataModule1.adoquery14.fieldbyname('hybh').AsString);

sfilename:=sfilename+'.'+'doc';

bs.SaveToFile(sfilename);

try

djhyopenform:=Tdjhyopenform.Create(self);

djhyopenform.olecontainer1.CreateObjectFromFile(sfilename,false);

djhyopenform.OleContainer1.Iconic:=true;

djhyopenform.ShowModal;

finally

djhyopenform.Free;

end;

finally

bs.free;

end;

(24).中文标题的提示框。

procedure TdjhyForm.SpeedButton5Click(Sender: TObject);

begin

if Application.MessageBox('', Mb_YesNo + Mb_IconWarning) =Id_yes then DataModule1.ADOQuery14.Delete;

end;

(25).运行一应用程序文件。

WinExec('HH.EXE D:\Program files\common files\MyshipperCRM e-sales help\MyshipperCRM e-sales help.chm',SW_NORMAL);