Poblem with graphics.setclip method

[James Dean]

The following code is in the Handlescroll event:

Graphics _canvasGraphics = pictureBox1.CreateGraphics();

RectangleF clipRegion = new RectangleF(hScrollBar1.Value,
vScrollBar1.Value, (pictureBox1.Right - vScrollBar1.Width),
(pictureBox1.Bottom - hScrollBar1.Height));

_canvasGraphics.SetClip(clipRegion,System.Drawing. Drawing2D.CombineMode.
Replace);

_canvasGraphics.DrawImage(pictureBox1.Image,canvas Graphics.ClipBounds);

If i change the code to this it works fine:

Graphics _canvasGraphics = pictureBox1.CreateGraphics();

RectangleF clipRegion = new RectangleF(hScrollBar1.Value,
vScrollBar1.Value, (pictureBox1.Right - vScrollBar1.Width),
(pictureBox1.Bottom - hScrollBar1.Height));

_canvasGraphics.DrawImage(ModifiedBmp,new RectangleF(0, 0,
clipRegion.Width, clipRegion.Height),
clipRegion, GraphicsUnit.Pixel);
pictureBox1.Update();

_canvasGraphics.Dispose();

The problem is i need to set the clipping region in the graphics
class.....as u can see above i don't use the setclip at all......if i
try to set the clipping region at all then i cannot display the image.
The visible clipping region gets set to zero for some reason when i was
debugging it...can anyone see a way to fix this?.

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