VC 控件背景透明、文字背景透明

Visual C++  开发实战宝典

功能：位图上显示文字，背景透明。

void CP400Dlg::OnPaint() 

{

。。。。

CBitmap bmp;

bmp.LoadBitmap(IDB_YCH);

BITMAP bmInfo;

bmp.GetBitmap(&bmInfo);

int nBmpWidth,nBmpHeight;

nBmpWidth = bmInfo.bmWidth;

nBmpHeight = bmInfo.bmHeight;

CRect clientRC;

GetClientRect(clientRC);

CDC *pDC = GetDC();

CDC memDC;

memDC.CreateCompatibleDC(pDC);

memDC.SelectObject(&bmp);

pDC->StretchBlt(0,0,clientRC.Width(),clientRC.Height(),&memDC,0,0,nBmpWidth,nBmpHeight,SRCCOPY);

memDC.DeleteDC();

bmp.DeleteObject();

pDC->SetBkMode(TRANSPARENT);

CFont font;

font.CreatePointFont(350,"华文行楷",pDC);

pDC->SelectObject(&font);

pDC->SetTextColor(RGB(0,0,255));

pDC->SetBkColor(RGB(255,0,0));

pDC->TextOut(10,20,"江山如此多娇。");

pDC->TextOut(10,90,"引无数英雄竞折腰。");

}

功能：静态文本框去除背景，透明。

HBRUSH CP400Dlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor) 

{

HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);

// TODO: Change any attributes of the DC here

if (nCtlColor = CTLCOLOR_STATIC)

{

if (pWnd == GetDlgItem(IDC_STATIC1))

{

 pDC->SetBkColor(RGB(125,255,0));    //文字背景

pDC->SetTextColor(RGB(255,0,0));     //文字颜色

  pDC->SetBkMode(TRANSPARENT);      //不显示文字背景

             hbr = (HBRUSH)::GetStockObject(NULL_BRUSH); //编辑框背景。注意：和文字背景不是一个意思。

}

}

// TODO: Return a different brush if the default is not desired

return hbr;

}

效果：