How to draw the border and title of dialog or application when use Aero theme?

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C++

First, sorry for my poor English. But that can't stop me learn.

I want to draw the border and title with a bitmap. My system is windows 7, and turn on Aero theme. But i found i cannot draw border or title bar. Whereas, when I turn off Aero theme, it works. Here are some of my code. I want to know, how can I make it work when turn on Aero theme? Thanks...

bmp.LoadBitmap(IDB_BITMAP7);
bmp.GetBitmap(&bmpInfo);

pOldBmp = dcMemory.SelectObject(&bmp);

x = bmpInfo.bmWidth;
y = bmpInfo.bmHeight;

lrBorderWidth = ( x > m_nFrameWidth+m_nBorderWidth ) ? x : m_nFrameWidth+m_nBorderWidth;

winDC.StretchBlt( 0,m_nCaptionHeight,lrBorderWidth,winRC.Height()-m_nCaptionHeight,&dcMemory,0,0,x,y,SRCCOPY );
winDC.StretchBlt( winRC.Width()-lrBorderWidth,m_nCaptionHeight,lrBorderWidth,
winRC.Height()-m_nCaptionHeight,&dcMemory,0,0,x,y,SRCCOPY);

dcMemory.SelectObject(pOldBmp);
bmp.DeleteObject();