windows 如何在 VB.NET 中切换 Caps Lock？
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时间：2020-09-15 11:10:58 来源:igfitidea点击:
How do I toggle Caps Lock in VB.NET?
提问by Luke Girvin
Using VB.NET, how do I toggle the state of Caps Lock?
使用 VB.NET，如何切换 Caps Lock 的状态？
采纳答案by GEOCHET
From: http://www.vbforums.com/showthread.php?referrerid=61394&t=537891
来自：http: //www.vbforums.com/showthread.php?referrerid=61394& t=537891
Imports System.Runtime.InteropServices
Public Class Form2
Private Declare Sub keybd_event Lib "user32" ( _
ByVal bVk As Byte, _
ByVal bScan As Byte, _
ByVal dwFlags As Integer, _
ByVal dwExtraInfo As Integer _
)
Private Const VK_CAPITAL As Integer = &H14
Private Const KEYEVENTF_EXTENDEDKEY As Integer = &H1
Private Const KEYEVENTF_KEYUP As Integer = &H2
Private Sub Button1_Click( _
ByVal sender As System.Object, _
ByVal e As System.EventArgs _
) Handles Button1.Click
' Toggle CapsLock
' Simulate the Key Press
keybd_event(VK_CAPITAL, &H45, KEYEVENTF_EXTENDEDKEY Or 0, 0)
' Simulate the Key Release
keybd_event(VK_CAPITAL, &H45, KEYEVENTF_EXTENDEDKEY Or KEYEVENTF_KEYUP, 0)
End Sub
End Class
回答by Rob Rolnick
Try this:
试试这个：
Public Class Form1
Private Declare Sub keybd_event Lib "user32" (ByVal bVk As Byte, ByVal bScan As Byte, ByVal dwFlags As Integer, ByVal dwExtraInfo As Integer)
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Call keybd_event(System.Windows.Forms.Keys.CapsLock, &H14, 1, 0)
Call keybd_event(System.Windows.Forms.Keys.CapsLock, &H14, 3, 0)
End Sub
End Class
回答by Ben
I use this
我用这个
Private Declare Sub keybd_event Lib "user32" (ByVal bVk As Byte, ByVal bScan As Byte, ByVal dwFlags As Integer, ByVal dwExtraInfo As Integer)
Private Const KEYEVENTF_EXTENDEDKEY As Integer = &H1
Private Const KEYEVENTF_KEYUP As Integer = &H2
'put this where you want to turn caps lock on or off
keybd_event(VK_NUMLOCK, &H45, KEYEVENTF_EXTENDEDKEY Or 0, 0)
keybd_event(VK_NUMLOCK, &H45, KEYEVENTF_EXTENDEDKEY Or KEYEVENTF_KEYUP, 0)
