文件是否存在

1，需要的函数FindFirstFile，

2，需要的结构体：WIN32_FIND_DATA

详解：

https://blog.youkuaiyun.com/veryhehe2011/article/details/7769814

https://blog.youkuaiyun.com/qq2399431200/article/details/11878611

https://www.cnblogs.com/qinguoyi/p/7252463.html

bool FileExist( LPCTSTR strFileName ) {
	
	WIN32_FIND_DATA FindData;

	ZeroMemory(&FindData, sizeof(FindData) / sizeof(WIN32_FIND_DATA));

	HANDLE hFind = FindFirstFile( strFileName , &FindData);
	if ( hFind == INVALID_HANDLE_VALUE || hFind == NULL) {
		// File not found
		return false;
	}

	FindClose( hFind );
	hFind = NULL;
	return true;
}