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问题描述
我想运行一个简单的代码段,但是每次Access和Excel崩溃.
I want to run a simple snippet, but evertime Access and Excel crash.
我正在运行CallbackTest2,请您帮帮我.谢谢分配.
I'm running CallbackTest2, could you please help me. Thanks allot.
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
推荐答案
找到了解决方案.
我要改变的事情
- 从函数到子的CallbackMsg
- 用数据VarPtr("Hallo Welt")填充的字符串参数
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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