线程中添加消息循环

UINT ThreadFunc(LPVOID lpParam)									//线程函数
{
    int bRet = 0;
    MSG msg;
    while(true)
    {
        if ((bRet = PeekMessage(&msg,NULL ,0,0,PM_REMOVE)) != 0)//Peek不阻塞,如果使用GetMessage会阻塞
        {
            // handle the error and possibly exit
            if (msg.message == WM_USERMSG)
            {
                MessageBox(NULL, "receive from main thread", "", MB_OK);
            }
            else if (msg.message == WM_CLOSE)
            {
                return 0;
            }
        }
        //todo something
    }
    return 0;
}