Question

用下面方法对按钮控件进行了自绘。 请问如何添加代码，设置按钮的背景色？

void CHyperLinkButton::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{

CDC* pDC = CDC::FromHandle(lpDrawItemStruct->hDC);// 获取DC指针
CRect rect(lpDrawItemStruct->rcItem);//定义按钮区域并初始化
pDC->SetBkMode(TRANSPARENT);//设置背景为透明

UINT nBtnState = lpDrawItemStruct->itemState;//取得按钮状态
CFont * pOldFont = NULL;
CString strText;
GetWindowText(strText); //获得按钮文本
if (m_bMouseOver)//光标在按钮上
{
if (nBtnState&ODS_SELECTED)//按下按钮,绘制反向矩形框
{
pDC->Draw3dRect(rect,GetSysColor(COLOR_3DSHADOW), GetSysColor(COLOR_3DHILIGHT));
}
else//未按下按钮，绘制正常矩形框
{
pDC->Draw3dRect(rect,GetSysColor(COLOR_3DHILIGHT),GetSysColor(COLOR_3DSHADOW));
}

pDC->SetTextColor(RGB(0,0,255)); //字体颜色设置为蓝色

if (m_fontUnderline.GetSafeHandle() == NULL)
{
CFont * pFont = GetFont();
ASSERT(pFont);
LOGFONT lf;
pFont->GetLogFont(&lf);
lf.lfUnderline = TRUE; //加下画线
m_fontUnderline.CreateFontIndirect(&lf);
}
pOldFont = pDC->SelectObject(&m_fontUnderline);
}
else pDC->SetTextColor(GetSysColor(COLOR_BTNTEXT));//采用系统字体
pDC->DrawText(strText, rect, DT_CENTER | DT_VCENTER | DT_SINGLELINE);//显示按钮文本
if (pOldFont)
pDC->SelectObject(pOldFont);
}

Answer 1

if (nBtnState&ODS_SELECTED)//按下按钮,绘制反向矩形框
{
pDC->Draw3dRect(rect,GetSysColor(COLOR_3DSHADOW), GetSysColor(COLOR_3DHILIGHT));
}
else//未按下按钮，绘制正常矩形框
{
pDC->Draw3dRect(rect,GetSysColor(COLOR_3DHILIGHT),GetSysColor(COLOR_3DSHADOW));
}
Draw3dRect改变第二个参数就好了，第二个参数指定颜色