Question

How to load Images from disk to Device context of and SDI MFC application. I want to choose images from existing folder at runtime.

Answer 1

It is probably the easiest to use CImage, see: http://msdn.microsoft.com/en-us/library/bwea7by5(v=vs.80).aspx

It’s something like:

void CMyDlg::OnBnClickedOpenImage()
{
    CFileDialog dialog(TRUE, NULL, NULL,
        OFN_FILEMUSTEXIST | OFN_HIDEREADONLY,
        L"Windows Bitmap (*.bmp)|*.bmp|JPEG Compressed Image (*.jpg;*.jpeg)|*.jpg; *.jpeg|PNG Image (*.png)|*.png|All Images (*.bmp;*.jpg;*.jpeg;*.png)|*.bmp; *.jpg; *.jpeg; *.png|All Files (*.*)|*.*||");

    if (dialog.DoModal() == IDOK)
    {
        HDC hDC = pDC->GetSafeHdc();
        CImage image;
        image.Load(dialog.GetPathName());
        image.Draw(hDC, 0, 0);
    }
}

Edit: Added the open file dialog.