具体是这样的: debug assertion failed! Program: File:f:\dd\v

[忠明]

[Eleven]

BOOL CGdiObject::Attach(HGDIOBJ hObject)
{
	ASSERT(m_hObject == NULL);      // only attach once, detach on destroy
	if (hObject == NULL)
	{
		return FALSE;
	}
	// remember early to avoid leak
	m_hObject = hObject;
	CHandleMap* pMap = afxMapHGDIOBJ(TRUE); // create map if not exist
	ASSERT(pMap != NULL);
	pMap->SetPermanent(m_hObject, this);
	return TRUE;
}

应该是你的GDI对象已经关联了一个资源，之后又重复关联，所以就出错了。