Get a portion of an image?

[bonedoc]

If I have a picturebox and want to capture the lower right quarter of it, what do I need to do? I cant seem to figure it out for the life of me. For some reason, I can only create an image that is a quarter of the size of the image, but it is always from (0,0).

Dim r1 As New Rectangle(x2, y2, PictureBox1.Width / 2, PictureBox1.Width / 2)
                Dim b1 As New SolidBrush(Color.Black)
                g.FillRectangle(b1, PictureBox1.ClientRectangle)
                g.DrawImage(PictureBox1.Image, r1, PictureBox1.ClientRectangle, GraphicsUnit.Pixel)

 

[JohnH]

You are now drawing to 'r1' rectangle from source rectangle full PictureBox1.ClientRectangle, so it scale the source to fit target.

You have to calculate the source rectangle to be drawn.