shift.frm

捕获键盘操作的记录

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "判断Caps Lock键"
   ClientHeight    =   1080
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   3075
   LinkTopic       =   "Form1"
   ScaleHeight     =   1080
   ScaleWidth      =   3075
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton Command1 
      Caption         =   "判断Caps Lock键"
      Height          =   615
      Left            =   120
      TabIndex        =   0
      Top             =   120
      Width           =   2655
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit

Private Declare Function GetAsyncKeyState Lib "user32" (ByVal VKEY As Long) As Integer
Private Declare Function GetKeyState Lib "user32" (ByVal nVirtKey As Long) As Integer
Const VK_CAPITAL = &H14
Public Function CapsLockOn() As Boolean
    Static bInit As Boolean
    Static bOn As Boolean
    If Not bInit Then
        While GetAsyncKeyState(VK_CAPITAL)
        Wend
        bOn = GetKeyState(VK_CAPITAL)
        bInit = True
    Else
        If GetAsyncKeyState(VK_CAPITAL) Then
            While GetAsyncKeyState(VK_CAPITAL)
                DoEvents
            Wend
            bOn = Not bOn
        End If
    End If
    CapsLockOn = bOn
End Function

Private Sub Command1_Click()
    If CapsLockOn Then MsgBox "CapsLock键开" Else: MsgBox "CapsLock键关"
End Sub