为什么下列程序中,点了COMMAND1后,没有弹出“HI”???Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Private Const WM_LBUTTONDOWN = &H201
Private Const WM_LBUTTONUP = &H202Private Sub Command1_Click()
a = SendMessage(Command2.hwnd, WM_LBUTTONDOWN, 0, 0)
b = SendMessage(Command2.hwnd, WM_LBUTTONUP, 0, 0)
End SubPrivate Sub Command2_Click()
MsgBox "hi"
End Sub
Private Const WM_LBUTTONDOWN = &H201
Private Const WM_LBUTTONUP = &H202Private Sub Command1_Click()
a = SendMessage(Command2.hwnd, WM_LBUTTONDOWN, 0, 0)
b = SendMessage(Command2.hwnd, WM_LBUTTONUP, 0, 0)
End SubPrivate Sub Command2_Click()
MsgBox "hi"
End Sub
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Call SendMessage(Command2.hwnd, WM_LBUTTONDOWN, 0, 0)
End SubPrivate Sub Command2_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
MsgBox "hi"
End Sub
MsgBox "down"
End SubPrivate Sub Command2_MouseUp(Button As Integer, Shift As Integer, X As Single, Y As Single)
MsgBox "up"
End Sub