我想运行一个简单的代码片段,但每次 Access 和 Excel 都会崩溃。
我正在运行回调测试 2,您能帮我一下吗?多谢。
Declare Function CallWindowProc Lib "user32" Alias "CallWindowProcA" ( _
ByVal lpPrevWndFunc As Long, _
ByVal hwnd As Long, _
ByVal msg As Long, _
ByVal wParam As Long, _
ByVal lParam As Long) _
As Long
Sub CallbackTest2()
CallWindowProc AddressOf CallbackMsg, 0, 0, 0, 0
End Sub
Public Function CallbackMsg _
(msg As String, _
ByVal nUnused1 As Long, _
ByVal nUnused2 As Long, _
ByVal nUnused3 As Long)
MsgBox "CallBack Work :)" & msg
End Function
找到了解决方案。
我改变的事情:
- 从函数到子函数的 CallbackMsg
- 字符串参数填充数据 VarPtr("Hallo Welt")
运行版本:
Private Declare Function CallWindowProc _
Lib "user32.dll" Alias "CallWindowProcA" ( _
ByVal lpPrevWndFunc As Long, _
ByVal hwnd As Long, _
ByVal msg As Long, _
ByVal wParam As Long, _
ByVal lParam As Long) As Long
private Sub CallbackTest2()
CallWindowProc AddressOf CallbackMsg, VarPtr("Hallo Welt"), 0, 0, 0
End Sub
Private Sub CallbackMsg( _
msg As String, _
ByVal nUnused1 As Long, _
ByVal nUnused2 As Long, _
ByVal nUnused3 As Long)
MsgBox msg
End Sub
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