目前是这么解决的
case ID_BUTTON_5: // Notifications sent by 'Button'
hItem = WM_GetDialogItem(pMsg->hWin, ID_BUTTON_5);
switch(NCode) {
case WM_NOTIFICATION_CLICKED:
BUTTON_SetBitmapEx(hItem,0,&bmreturn1,0,0);
break;
case WM_NOTIFICATION_RELEASED:
BUTTON_SetBitmapEx(hItem,0,&bmreturn,0,0);
WM_DeleteWindow(hWin_dc);
break;