根据主窗口句柄+控件ID，获取任意控件句柄

HWND mIDHWnd,mChildHWnd;    //mIDHWnd返回的控件句柄，mChildHWnd是主窗口的子窗口句柄
HWND GetChildHWnd(HWND mHwnd, int ID)  //mHwnd是主窗口句柄，ID是控件的ID
{        
        while (mHwnd)
        {        
                int id=0;
                id=::GetDlgCtrlID(mHwnd);           
                if (id==ID)
                {
                        mIDHWnd=mHwnd;
                        break;
                }
                if (mChildHWnd=::GetWindow(mHwnd,GW_CHILD))
                {
                        GetChildHWnd(mChildHWnd,ID);
                }
                mHwnd=::GetWindow(mHwnd,GW_HWNDNEXT);
        }
        return mIDHWnd;
}