WSAAsyncSelect函数编译老是提示出现异常

WSAAsyncSelect函数编译老是提示出现错误?

C/C++ code

err = ::WSAAsyncSelect(ServerSock, this->m_hWnd, UM_SOCKET, FD_READ | FD_WRITE);            if(err == SOCKET_ERROR)            {                MessageBox("注册失败");                return FALSE;            }调用了WSAStartup()初始化也导入了头文件（winsock2.h）和 库文件（ws2_32.lib）

C/C++ code

  #define UM_SOCKET WM_USER + 100; 改为  #define UM_SOCKET WM_USER + 100