C#

    Public Function WindowCapture(ByVal form As Form) As Bitmap<br />
        ' Get this form's Graphics object.<br />
        Dim me_gr As Graphics = form.CreateGraphics<br />
<br />
        ' Make a Bitmap to hold the image.<br />
        Dim bm As New Bitmap(form.Width, form.Height, me_gr)<br />
        Dim bm_gr As Graphics = me_gr.FromImage(bm)<br />
        Dim bm_hdc As IntPtr = bm_gr.GetHdc<br />
<br />
        ' Get the form's hDC. We must do this after <br />
        ' creating the new Bitmap, which uses me_gr.<br />
        Dim me_hdc As IntPtr = win32api.GetWindowDC(form.Handle)<br />
<br />
        ' BitBlt the form's image onto the Bitmap.<br />
        win32api.BitBlt(bm_hdc, 0, 0, form.Width, form.Height, _<br />
            me_hdc, 0, 0, win32api.SRCCOPY)<br />
        bm_gr.ReleaseHdc(bm_hdc)<br />
<br />
        ' Return the result.<br />
        Return bm<br />
    End Function<br />