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分享关于SendMessageCallback函数提示出现错误问题,错误号error C2664...
::SendMessageCallback (this->m_hWnd,WM_COMMAND,MAKEWPARAM(ID_TARGETCOMMAND,0),0,MySendAsyncProc,(ULONG)pTm);
提示:
error C2664: 'SendMessageCallbackA' : cannot convert parameter 5 from 'void (struct HWND__ *,unsigned int,unsigned long,long)' to 'void (__stdcall *)(struct HWND__ *,unsigned int,unsigned long,long)'
None of the functions with this name in scope match the target type
这是怎么回事情,原先pTm的类型是ULONG_PTR，但在vc6中辨认不了这种数据类型，我换成ULONG就出现上述错误，请高手指点！
提示:
error C2664: 'SendMessageCallbackA' : cannot convert parameter 5 from 'void (struct HWND__ *,unsigned int,unsigned long,long)' to 'void (__stdcall *)(struct HWND__ *,unsigned int,unsigned long,long)'
None of the functions with this name in scope match the target type
这是怎么回事情,原先pTm的类型是ULONG_PTR，但在vc6中辨认不了这种数据类型，我换成ULONG就出现上述错误，请高手指点！
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top_hipster 2004-04-06
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回调函数调用约定定义不正确，加上CALLBACK 修饰就没问题了
CHKK 2004-04-06
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晚了~
