VB 设置CapsLock、ScrollLock、NumLock键状态

最新推荐文章于 2023-12-06 13:27:03 发布

miaozk2006

最新推荐文章于 2023-12-06 13:27:03 发布

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本文链接：https://blog.youkuaiyun.com/miaozk2006/article/details/82417058

本文介绍了如何使用Visual Basic（VB）编程来设置计算机的CapsLock、ScrollLock和NumLock键的状态。通过示例代码，程序员可以学习到如何切换这些键盘锁定键，从而实现特定的软件功能。

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Option Explicit
Private Declare Sub keybd_event Lib "user32" (ByVal bVk As Byte, ByVal bScan As Byte, ByVal dwFlags As Long, ByVal dwExtraInfo As Long)
Private Declare Function GetKeyState Lib "user32" (ByVal nVirtKey As Long) As Integer
Private Declare Function MapVirtualKey Lib "user32" Alias "MapVirtualKeyA" (ByVal wCode As Long, ByVal wMapType As Long) As Long
Const KEYEVENTF_EXTENDEDKEY = &H1
Const KEYEVENTF_KEYUP = &H2
Public Sub SetNumLock(ByVal bLock As Boolean)
    Dim i As Boolean, ScanCode As Long
    i = CBool(GetKeyState(vbKeyNumlock) And vbShiftMask)
    If i <> bLock Then
        ScanCode = MapVirtualKey(vbKeyNumlock, 0)
        Call keybd_event(vbKeyNumlock, ScanCode, 0, 0)
        Call keybd_event(vbKeyNumlock, ScanCode, KEYEVENTF_KEYUP, 0)
    End If
End Sub
Public Sub SetScrollLock(ByVal bLock As Boolean)
    Dim i As Boolean, ScanCode As Long
    i = CBool(GetKeyState(vbKeyScrollLock) And vbShiftMask)
    If i <> bLock Then
        ScanCode = MapVirtualKey(vbKeyScrollLock, 0)
        Call keybd_event(vbKeyScrollLock, ScanCode, 0, 0)
        Call keybd_event(vbKeyScrollLock, ScanCode, KEYEVENTF_KEYUP, 0)
    End If
End Sub
Public Sub SetCapsLock(ByVal bLock As Boolean)
    Dim i As Boolean, ScanCode As Long
    i = CBool(GetKeyState(vbKeyCapital) And vbShiftMask)
    If i <> bLock Then
        ScanCode = MapVirtualKey(vbKeyCapital, 0)
        Call keybd_event(vbKeyCapital, ScanCode, 0, 0)
        Call keybd_event(vbKeyCapital, ScanCode, KEYEVENTF_KEYUP, 0)
    End If
End Sub
Private Sub Command1_Click()
    Call SetScrollLock(True)
End Sub

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