方法一:改变你绘图板的尺寸,绘图板可以放在panel里面,panel设置自动出现滚动条。
方法二:截取
Dim p As WinForm.Painter = e.Form.Controls("Painter1")
Dim g As Graphics = p.Graphics
Dim img = getImage("d:\test.jpg")
Dim bmp As bitmap
If img.width > p.width OrElse img.height > p.height Then
bmp = new bitmap(img, p.Width, p.height)
End If
g.drawimage(bmp,0,0)
p.Repaint()