在内存dc上textout文字，怎样才能设定文字颜色？为什么我用Memdc.SetTextColor毫无效果？

Question

如题

Answer 1

刚测试了一下，用SetTextColor没有问题，估计是你的别的地方有错

Answer 2

应该是不会有问题的，至少DrawText已经测试通过

Answer 3

代码如下，有什么错？// CScrollPtStatic 消息处理程序
void CScrollPtStatic::OnPaint() 
{
CPaintDC dc(this);
m_dc=&dc;
// CPaintDC dc(this); // device context for painting
m_dc->SetTextColor(m_crText);
m_dc->SetBkMode(TRANSPARENT);
m_dc->SelectObject(this->GetFont());// CDC MemDC;
CDC m_ScMemmdc;
m_ScMemmdc.CreateCompatibleDC(m_dc);
m_ScMemmdc.SetMapMode(m_dc->GetMapMode());
///准备工作 CRect rect;
CPen BorderPen,*pOldPen,UnderLinePen;
CBrush BGBrush,*pOldBrush;
BITMAP bm;
int nTextLeft=0,nTextTop=0; //文字输出的位置 this->GetClientRect(&rect); ///画边框
if(m_bBorder)
{
BorderPen.CreatePen(PS_SOLID,1,m_crBorder);
BGBrush.CreateSolidBrush(m_crBG); pOldPen = m_dc->SelectObject(&BorderPen);
pOldBrush = m_dc->SelectObject(&BGBrush); m_dc->Rectangle(&rect); m_dc->SelectObject(pOldPen);
m_dc->SelectObject(pOldBrush); rect.DeflateRect(1,1);
}
///贴背景图
if(m_bClicked && m_ClickedBGBm.GetSafeHandle()!=NULL)
{
m_ScMemmdc.SelectObject(m_ClickedBGBm);
m_dc->BitBlt(rect.left,rect.top,rect.Width(),rect.Height(),
&m_ScMemmdc,0,0,SRCCOPY);
}
else if(m_bOver && m_MouseOverBGBm.GetSafeHandle()!=NULL)//鼠标经过的时候
{
m_ScMemmdc.SelectObject(m_MouseOverBGBm);
m_dc->BitBlt(rect.left,rect.top,rect.Width(),rect.Height(),
&m_ScMemmdc,0,0,SRCCOPY);
}
else if(m_BGBm.GetSafeHandle()!=NULL)
{
m_ScMemmdc.SelectObject(m_BGBm);
m_dc->BitBlt(rect.left,rect.top,rect.Width(),rect.Height(),
&m_ScMemmdc,0,0,SRCCOPY);
}
///贴标签图片
if(m_bClicked && m_ClickedLabelBm.GetSafeHandle()!=NULL)
{
m_ClickedLabelBm.GetBitmap(&bm);
double fScal=bm.bmWidth*1.0/bm.bmHeight;
nTextLeft=int(rect.Height()*fScal)+4;
m_ScMemmdc.SelectObject(m_ClickedLabelBm);
m_dc->StretchBlt(rect.left,rect.top,int(rect.Height()*fScal),rect.Height(),
&m_ScMemmdc,0,0,bm.bmWidth,bm.bmHeight,SRCCOPY);
}
else if(m_bOver && m_MouseOverLabelBm.GetSafeHandle()!=NULL)
{
m_MouseOverLabelBm.GetBitmap(&bm);
double fScal=bm.bmWidth*1.0/bm.bmHeight;
nTextLeft=int(rect.Height()*fScal)+4;
m_ScMemmdc.SelectObject(m_MouseOverLabelBm);
m_dc->StretchBlt(rect.left,rect.top,int(rect.Height()*fScal),rect.Height(),
&m_ScMemmdc,0,0,bm.bmWidth,bm.bmHeight,SRCCOPY);
}
else if(m_LabelBm.GetSafeHandle()!=NULL)
{
m_LabelBm.GetBitmap(&bm);
double fScal=bm.bmWidth*1.0/bm.bmHeight;
nTextLeft=int(rect.Height()*fScal)+4;
m_ScMemmdc.SelectObject(m_LabelBm);
m_dc->StretchBlt(rect.left,rect.top,int(rect.Height()*fScal),rect.Height(),
&m_ScMemmdc,0,0,bm.bmWidth,bm.bmHeight,SRCCOPY);
}
else
{
nTextLeft=4;
}    TEXTMETRIC tm;
m_dc->GetTextMetrics(&tm);
UINT nWidth = tm.tmAveCharWidth * m_strText.GetLength()+2*width;
UINT nHeight = height; m_ScMemmdc.SelectObject(this->GetFont());
m_ScMemmdc.SetTextColor(RGB(255, 0, 0)); CBitmap bitmap;
bitmap.CreateCompatibleBitmap(&m_ScMemmdc,nWidth,nHeight);
CBitmap* pOldBitmap = m_ScMemmdc.SelectObject(&bitmap);
m_ScMemmdc.FillSolidRect(0,0,nWidth,nHeight,m_dc->GetBkColor());
    m_ScMemmdc.TextOut(0,0,m_strText);
    
    m_dc->BitBlt(0,0,width,nHeight,&m_ScMemmdc,mstartX,0,SRCCOPY);
m_ScMemmdc.SelectObject(pOldBitmap);
m_ScMemmdc.DeleteDC();
bitmap.DeleteObject();