各位大虾，一个简单小问题帮帮忙，谢谢！

Question

我用shellexecute()打开文件，想对返回值进行判定，如果打不开就显示一个对话框
具体程序：if(ShellExecute(h,"open",Char1,NULL,NULL,SW_SHOWNORMAL) == ERROR_FILE_NOT_FOUND)
{MessageBox(szErrorInfo,"NO",MB_OK);}
编译显示错误，想请各位看看，十分感谢

Answer 1

if(ShellExecute(NULL,"open","c:\\aaa.aaa",NULL,NULL,SW_SHOWNORMAL) == (HINSTANCE)ERROR_FILE_NOT_FOUND)
{::MessageBox(this->GetSafeHwnd(),"没有文件。","NO",MB_OK);}

Answer 2

ERROR_FILE_NOT_FOUND要强制转换成HINSTANCE