Làm cách nào để chuyển đổi Caps Lock trong VB.NET?

Question

Sử dụng VB.NET, làm cách nào để chuyển đổi trạng thái của Caps Lock?

Answer 1

Từ: 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 

Answer 2

Hãy thử this:

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 

Answer 3

tôi sử dụng này

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)