我用API实现----->>>>>>在窗体中加入一个按钮和一个文本框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'函数中虽然有四个参数,但关键的是前两个:hwnd 和wMsg. 'Hwnd是句柄. 'wMsg是一个十六进制数,代表了函数要发送的具体消息.Const WM_UNDO = &H304 Dim ret As Long
Private Sub Command1_Click() ret = SendMessage(Text1.hwnd, WM_UNDO, 0, 0) End Sub
(ByVal hwnd As Long, _
ByVal wMsg As Long, _
ByVal wParam As Long, _
lParam As Any) As Long'函数中虽然有四个参数,但关键的是前两个:hwnd 和wMsg.
'Hwnd是句柄.
'wMsg是一个十六进制数,代表了函数要发送的具体消息.Const WM_UNDO = &H304
Dim ret As Long
Private Sub Command1_Click()
ret = SendMessage(Text1.hwnd, WM_UNDO, 0, 0)
End Sub