RectControl.DrawInto

The documentations: Draws the contents of the RectControl into the specified Graphics context.
But I found that it draws only the RectControl visible area portion.

mPic = new Picture(res.Width, res.Height,32) Canvas1.drawinto(mpic.graphics, 0, 0) Canvas2.Invalidate(false)

Canvas2:

Sub Paint(g As Graphics, areas() As REALbasic.Rect) Handles Paint g.DrawPicture(mpic, 0,0,me.Width,me.Height) End Sub
The canvas1 shows only a portion of the image “res”
The canvas2 has the size to show all the image, but only shows the portion visible of the canvas1

Is it like this? or am I doing something wrong?