陈耀华
在一些应用软件中,收集键盘和鼠标的信息比较重要,而VB5.0又没有提供相应的函数达到这个目的。实际上可以用相应的API来实现，如笔者的键盘信息为:键盘类型:IBM 101/102增强键盘,重复击键速度每秒钟15个字符,键盘延时0秒,光标闪烁间隔500ms；鼠标为MS双键，双击间隔为300ms。运行以下程序就可以收集到以上信息。
程序代码：
建立一模块,命名为info.bas,API声明如下：
Option Explicit
′搜集键盘信息的API
Declare Function GetCaretBlinkTime Lib ″user32″ () As Long
Public Const SPI—GETKEYBOARDSPEED = 10
Public Const SPI—GETKEYBOARDDELAY = 22
Declare Function SystemParametersInfo Lib ″user32″ Alias ″SystemParametersInfoA″ (ByVal uAction As Long,
ByVal uParam As Long, lpvParam As Any, ByVal fuWinIni As Long) As Long
Declare Function GetKeyboardType Lib ″user32″ (ByVal nTypeFlag As Long) As Long
′搜集鼠标信息的API
Declare Function GetDoubleClickTime Lib ″user32″ () As Long
Public Const SM—CMOUSEBUTTONS = 43
Declare Function GetSystemMetrics Lib ″user32″ (ByVal nIndex As Long) As Long
Public Const SM—MOUSEPRESENT = 19
主窗口(Form1)上放Command1,Timer1及4个label,分别命名为lblkeyboard,lblrepeatspeed,lblrepeatdelay,lblcaretflash.显示键盘的信息建一shape1,表示光标闪烁的效果。2个label,分别命为lblmouse,lbldblclick显示鼠标的信息。
Private Sub Command1—Click()
Dim r As Long
Dim t As String
Dim k As Long
Dim q As Long
k = GetKeyboardType(0)
If k = 1 Then t = ″PC or compatible 83－key keyboard″
If k = 2 Then t = ″Olivetti 102－key keyboard″
If k = 3 Then t = ″AT or compatible 84－key keyboard″
If k = 4 Then t = ″Enhanced(IBM) 101－102－key keyboard″
If k = 5 Then t = ″Nokia 1050 keyboard″
If k = 6 Then t = ″Nokia 9140 keyboard″
If k = 7 Then t = ″Japanese keyboard″
lblkeyboard = ′Type of keyboard : ″ ＆ t
q = SystemParametersInfo(SPI—GETKEYBOARDDELAY, 0, r, 0)
lblrepeatdelay = ″Keyboard Repeat Delay = ″ ＆ r ＆ ″ Seconds″
q = SystemParametersInfo(SPI—GETKEYBOARDSPEED, 0, r, 0)
scrRepeatSpeed = r
lblrepeatspeed = ″Keyboard Repeat Speed = ″ ＆ r ＆ ″ characters per second.″
Timer1.Interval = GetCaretBlinkTime
scrCaretFlash = GetCaretBlinkTime
lblcaretflash = ″Caret Flash Speed = ″ ＆ GetCaretBlinkTime ＆ ″ms″
If GetSystemMetrics(SM_MOUSEPRESENT) = 1 Then
lblmouse = ″Standard Mouse Present with ″ ＆ GetSystemMetrics(SM—CMOUSEBUTTONS) ＆ ″ buttons.″
Else
lblmouse = ″No Mouse Present.″
Exit Sub
End If
lbldblclick = ″Double Click Speed = ″ ＆ GetDoubleClickTime ＆ ″ms″
End Sub
Private Sub Form—Load()
Call Command1—Click
End Sub
Private Sub Timer1—Timer()
Shape1.Visible = Not Shape1.Visible
End Sub
按F5运行,点击Command1即可收集到键盘和鼠标信息。
此程序在Pwin95和中文VB5.0中成功运行通过,已运用到实际工作中。
