CDC::StretchBlt
This method copies a bitmap from a source rectangle into a destination rectangle, and stretches or compresses the bitmap to fit the dimensions of the destination rectangle.
BOOL StretchBlt (
int x,
int y,
int nWidth,
int nHeight,
CDC* pSrcDC,
int xSrc,
int ySrc,
int nSrcWidth,
int nSrcHeight,
DWORD dwRop );