子窗口要怎麼樣才能收到WM_DRAWITEM消息啊?

在SDK程式中,我用如下代碼CREATE一個BUTTON:
hWndButton=CreateWindowEx(NULL,"Button","Command",WS_CHILD|WS_VISIBLE|BS_OWNERDRAW,cx,cy,iWidth,iHight,hWndParent,(HMENU)uID,hIns,NULL); hWndButton=Cre