mfc多文档中，怎样实现点击工具条上的按钮后弹出自己的子窗口

void CMainFrame::OnButton32772() 

{

	CChildFrame *pWnd = new CChildFrame;

	if (!pWnd->Create(_T("ChildFrame"), WS_CHILD | WS_VISIBLE | WS_OVERLAPPEDWINDOW, rectDefault, this))

		return;

}

BOOL CChildFrame::Create(LPCTSTR szTitle, LONG style /* = 0 */,

	const RECT& rect /* = rectDefault */,

	CMDIFrameWnd* parent  /* = NULL */)

{

	HICON hIcon = AfxGetApp()->LoadIcon(IDR_VS6QHTYPE);

	LPCTSTR lpszClass = AfxRegisterWndClass(CS_HREDRAW | CS_VREDRAW,	LoadCursor(NULL, IDC_ARROW),	(HBRUSH)(COLOR_WINDOW+1),	hIcon);



	return CMDIChildWnd::Create(lpszClass, szTitle, style, rect, parent);

}