How to get an file-loaded bitmap to fit a static image container using StretchBlt ?

[Mike Pliam]

The code below will load a bitmap from a disk file. How can I get the loaded bitmap, regardless of it's original size, to fit into an existing interface static image container?

void CMyDlg::OnFileOpen()
{
	CString m_csPathname, m_csFilename;

	const wchar_t fileDialogFilter[] = 
	_T("Bitmap Files(*.bmp)|*.bmp||");
	const wchar_t fileDialogExt[] = _T("bmp");

	CFileDialog fileDialog(TRUE, 
		fileDialogExt, NULL,
		OFN_FILEMUSTEXIST, fileDialogFilter);

	if (fileDialog.DoModal() == IDOK)
    {
		CWaitCursor wait;

		m_csPathname = fileDialog.GetPathName();
		m_csFilename = fileDialog.GetFileName();
		SetWindowText(m_csFilename);

	}

	CWaitCursor wait;

	// Load the Image File
	HBITMAP hBmp = (HBITMAP)::LoadImage(NULL, m_csPathname, IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE|LR_CREATEDIBSECTION);

	// The StretchBlt function copies a bitmap from a source rectangle into a destination rectangle, stretching or 
	// compressing the bitmap to fit the dimensions of the destination rectangle, if necessary. The system stretches or 
	// compresses the bitmap according to the stretching mode currently set in the destination device context.
	//
	// BOOL StretchBlt(
	// __in  HDC hdcDest,			// A handle to the destination device context.
	// __in  int nXOriginDest,		// The x-coordinate, in logical units, of the upper-left corner of the destination rectangle.
	// __in  int nYOriginDest,		// The y-coordinate, in logical units, of the upper-left corner of the destination rectangle.
	// __in  int nWidthDest,		// The width, in logical units, of the destination rectangle.
	// __in  int nHeightDest,		// The height, in logical units, of the destination rectangle.
	// __in  HDC hdcSrc,			// A handle to the source device context.
	// __in  int nXOriginSrc,		// The x-coordinate, in logical units, of the upper-left corner of the source rectangle.
	// __in  int nYOriginSrc,		// The y-coordinate, in logical units, of the upper-left corner of the source rectangle.
	// __in  int nWidthSrc,			// The width, in logical units, of the source rectangle.
	// __in  int nHeightSrc,		// The height, in logical units, of the source rectangle.
	// __in  DWORD dwRop			// The raster operation to be performed. Raster operation codes define how the system combines colors in output operations that involve a brush, a source bitmap, and a destination bitmap.
	// );


	m_cImage.SetBitmap(hBmp);

	m_csEdit1.Empty();
	m_csEdit2.Empty();
	m_csEdit3.Empty();
	UpdateData(FALSE);

}// OnFileOpen()

It is my understanding that the StretchBlt(...) function pertains to the destination device context. I am unclear as to how to determine the rectangle of the bitmap that has been loaded and what the dwRop is supposed to be. I have not found a suitable example.