How to draw a opaque image on the Aero glass window? - c++

Question

I have used DWM API to create a Aero glass window by calling DwmExtendFrameIntoClientArea.
void CMainFrame::OnActivate(UINT nState,CWnd* pWndOther,BOOL bMinimized )
{
CFrameWnd::OnActivate(nState,pWndOther,bMinimized);
BOOL fDwmEnabled = FALSE;
if (SUCCEEDED(DwmIsCompositionEnabled(&fDwmEnabled)))
{
if(nState == WA_ACTIVE )
{
MARGINS margins ={-1};
HRESULT hr = DwmExtendFrameIntoClientArea(m_hWnd, &margins);
if (!SUCCEEDED(hr))
TRACE0("Failed to DwmExtendFrameIntoClientArea\n");
}
}
}
And then, I draw a bitmap image on the window (I also have tried to call DrawThemeIcon and CImageList::Draw to draw the image).
void CMainFrame::DisplayBitmap( CBitmap *p, CDC *pDC)
{
CDC dcMemory;
BITMAP bm;
dcMemory.CreateCompatibleDC(pDC);
dcMemory.SelectObject(p);
p->GetBitmap(&bm);
pDC->BitBlt(100,100,bm.bmWidth,bm.bmHeight,&dcMemory,0,0,SRCCOPY);
}
void CMainFrame::OnNcPaint(){
CFrameWnd::OnNcPaint();
CDC* dc = GetWindowDC();
CRect rct;
GetWindowRect(&rct);
dc->FillSolidRect(0, 0, rct.right - rct.left, rct.bottom - rct.top, RGB(0, 0, 0));
DisplayBitmap(&bmpBtn,dc);
ReleaseDC(dc);
}
I found out the image is ugly and translucency. How to draw a opaque image on the Aero glass window?
Update:
I still need somebody who can provide another solution without using GDI+ library for me. Thanks!

Answer 1

Solution 1:
CMainFrame::CMainFrame()
{
GdiplusStartupInput gdiplusStartupInput;
ULONG_PTR gdiplusToken;
//Initialize GDI+.
GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);
m_pImage = m_pImage->FromFile (_T("lena.bmp"));
}
void CMainFrame::OnNcPaint(){
CFrameWnd::OnNcPaint();
CDC* dc = GetWindowDC();
CRect rct;
GetWindowRect(&rct);
dc->FillSolidRect(0, 0, rct.right - rct.left, rct.bottom - rct.top, RGB(0, 0, 0));
CPaintDC gdc(this);
Graphics g(gdc);
//I don't why the image will disappear sometimes when I move the window.
g.DrawImage ( m_pImage, 0, 0 );
ReleaseDC(dc);
}
The Result: