你的坐标可能没有对准。参看以下代码:
CColorDialog dlg;
COLORREF m_SpecularColor;if(rect.PtInRect(point))
{
CColorDialog dlg;
if(dlg.DoModal()==IDOK)
{
m_SpecularColor= dlg.GetColor();
InvalidateRect(&rect,FALSE);
}
}CBrush SpecularBrush(m_SpecularColor);
dc.FillRect(&rect,&SpecularBrush);

解决方案 »

  1.   

    pDC->FloodFill(100,400,RGB(0,0,0));    //给矩形填充颜色改成pDC->FloodFill(101,401,RGB(0,0,0));    //给矩形填充颜色试试看?
      

  2.   

    void CSigleView::OnDraw(CDC* pDC)
    {
    CSigleDoc* pDoc = GetDocument();
    ASSERT_VALID(pDoc);        CBrush NewBrush;
    CBrush *OldBrush;
    NewBrush.CreateSolidBrush(RGB(0,0,0));  //初始化画刷
    OldBrush = pDC->SelectObject(&NewBrush);        pDC->Rectangle(100,400,200,500);        //画矩形
    pDC->SelectObject(OldBrush);

     it's ok