// 函数声明如下:

void SetAllChildCtrlToClipSiblingStyle(HWND hwndParent);

BOOL CALLBACK ProcChildFunc(HWND hwndChild,LPARAM lParam);

// 函数实现如下:

void CUsefulDlg::SetAllChildCtrlToClipSiblingStyle(HWND hwndParent)
{
   EnumChildWindows(hwndParent,ProcChildFunc,0);
}

BOOL CALLBACK ProcChildFunc(HWND hwndChild,LPARAM lParam)
{
   LONG oldStyle = GetWindowLong(hwndChild,GWL_STYLE);
   oldStyle |= WS_CLIPSIBLINGS;
   SetWindowLong(hwndChild,GWL_STYLE,oldStyle);
   return TRUE;
}

// 注意 ProcChildFunc为回调函数，应该声明为全局函数或者类的静态成员函数.