在VC中回调函数为：
C/C++ code:
typedef VOID (__stdcall *DL_AUTOCALLBACK )( DWORD dw1, DWORD dw2, LPVOID lpContext );
int Set( IN HANDLE hCamera, IN BOOL bAE,
IN BYTE btTarget, IN DL_AUTOCALLBACK pfCallback, IN LPVOID lpContext );
Vb中我声明为：
VB code:
Public Declare Function Set _'声明
Lib "XX.dll" (ByVal hCamera As Long, ByVal bAE As Boolean, ByVal btTarget As Byte, _
ByVal pfCallback As Long, ByVal lpContext As Long) As Integer
Public Function AECallback(ByVal dw1 As Long,ByVal dw2 As Long, ByRef lpContext As Long)'一到这就会出错
Dim val As Integer
…………
AECallback = 0
End Function
Set m_hDevice, True, 180, AddressOf XX.AECallback, MainForm.hWnd'这是我的调用
显示内存不能为读！
不知道这是个什么问题，是参数对应的问题吗？
DWORD 为unsigned long类型
LPVOID 为void*
怎么回事呢？有谁给个答案！
最后一句改为：Set m_hDevice, True, 180, byval AddressOf XX.AECallback, MainForm.hWnd
试一试
你要给出C++的原型。
还有，必须在标准模块里面写回调的代码。
set 是关键字，换一个名字。使用 alieas 关键字。
Public Function AECallback(ByVal dw1 As Long,ByVal dw2 As Long, ByRef lpContext As Long) <
TF1.text = " <_2_ZCHGZBH> " & MSFlexGrid1.TextMatrix(k, 1) & " </_2_ZCHGZBH> "
大家好，我用上面一个东西赋值 TF1.text = & ......
