DELPHI中使用热键

2006-09-16 05:50:28  編輯來源:互聯網  简体版  手機版  評論  字體: 小|中|大

 

 

　　在windows中规定应用程序热键的唯一标识符取值范围在0x0000~0xBFFF之间，动态链接库的取值范围在0xC000~0XFFFF之间。

　　 热键的辅助按键还包括Mod_Ctrl,Mod_Alt和Mod_Shift，对于windows兼容键盘，还包括windows标志键，Mod_Win。

　　 热键设置成功后，在程序运行过程中如果有预定义的热键被按下，windows系统都会给应用程序发送一个wm_hotkey消息。

　　 下面用一个例子演示它的使用

　　

　　

　　

　　 编译程序、运行，如果此程序不是当前桌面显示在最前边的窗体，按下ctrl+alt+a后，程序界面将出现在桌面的最上。

　　 示例程序开发平台：D7+WINXP

　　 转载请注明出处。

unit Unit1;

interface

uses

Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs;

type

TForm1 = class(TForm)

procedure FormCreate(Sender: TObject);

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

private

...{ Private declarations }

public

...{ Public declarations }

hotkeyid :integer; //记录热键标识

//处理wm_hotkey消息

procedure WMhotkeyhandle(var msg:Tmessage);

message wm_hotkey;

end;

var

Form1: TForm1;

implementation

...{$R *.DFM}

procedure TForm1.Wmhotkeyhandle

(var msg:Tmessage);

begin

//判断是否是ctrl+alt+a

if (msg.LParamHi=$41) and

(msg.lparamLo=MOD_CONTROL or mod_Alt) then

begin

msg.Result:=1;//正常返回

application.BringToFront;//将窗体显示在最前边

end;

end;

procedure TForm1.FormCreate(Sender: TObject);

begin

//通过原子表获得一个关于hotkey的唯一标识，注意本文前边提到的范围

hotkeyid:=GlobalAddAtom(pchar('UserDefineHotKey'))-$C000;

//注册ctrl+alt+a

registerhotkey(handle,hotkeyid,MOD_CONTROL or mod_Alt,$41);

end;

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

begin

unregisterhotkey(handle,hotkeyid);//

DeleteAtom(HotKeyID);

end;

end.

 

 

 

在windows中规定应用程序热键的唯一标识符取值范围在0x0000~0xBFFF之间，动态链接库的取值范围在0xC000~0XFFFF之间。 热键的辅助按键还包括Mod_Ctrl,Mod_Alt和Mod_Shift，对于windows兼容键盘，还包括windows标志键，Mod_Win。 热键设置成功后，在程序运行过程中如果有预定义的热键被按下，windows系统都会给应用程序发送一个wm_hotkey消息。 下面用一个例子演示它的使用 编译程序、运行，如果此程序不是当前桌面显示在最前边的窗体，按下ctrl+alt+a后，程序界面将出现在桌面的最上。 示例程序开发平台：D7+WINXP 转载请注明出处。 [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]unit Unit1; [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]interface [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]uses [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs; [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]type [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] TForm1 = class(TForm) [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] procedure FormCreate(Sender: TObject); [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] procedure FormClose(Sender: TObject; var Action: TCloseAction); [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] private [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedBlockStart.gif[/img][/url][url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedBlock.gif[/img][/url] ...{ Private declarations } [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] public [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedBlockStart.gif[/img][/url][url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedBlock.gif[/img][/url] ...{ Public declarations } [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] hotkeyid :integer; //记录热键标识 [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] //处理wm_hotkey消息 [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] procedure WMhotkeyhandle(var msg:Tmessage); [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] message wm_hotkey; [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] end; [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]var [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] Form1: TForm1; [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]implementation [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedBlockStart.gif[/img][/url][url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedBlock.gif[/img][/url]...{$R *.DFM} [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]procedure TForm1.Wmhotkeyhandle [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url](var msg:Tmessage); [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]begin [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] //判断是否是ctrl+alt+a [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] if (msg.LParamHi=$41) and [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] (msg.lparamLo=MOD_CONTROL or mod_Alt) then [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] begin [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] msg.Result:=1;//正常返回 [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] application.BringToFront;//将窗体显示在最前边 [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] end; [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]end; [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]procedure TForm1.FormCreate(Sender: TObject); [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]begin [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] //通过原子表获得一个关于hotkey的唯一标识，注意本文前边提到的范围 [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] hotkeyid:=GlobalAddAtom(pchar('UserDefineHotKey'))-$C000; [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] //注册ctrl+alt+a [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] registerhotkey(handle,hotkeyid,MOD_CONTROL or mod_Alt,$41); [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]end; [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction); [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]begin [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] unregisterhotkey(handle,hotkeyid);// [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] DeleteAtom(HotKeyID); [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]end; [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url] [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]end. [url=/bbs/detail_501490.html][img]http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif[/img][/url]