HWND怎么用messagebox输出

Question

HWND h=::FindWindow(NULL,Caption);

h类型不匹配啊？？？怎么转换才能输出呢

MessageBox(0,**这里怎么转换h呢**,NULL,MB_OK);

Answer 1

 CWnd* mark1;
mark1=FindWindow(NULL,"TEST");//TEST是我的当前实例窗口的title
//从CWND*转换成HWND
HWND tmp=mark1->GetSafeHwnd();     //得到它的HWND