url screen capture

[Fabio R.]

With GDI+ I've made a little winform app to capture a webpage snapshot,
using the CreateGraphic method of the Webbrowser control.
Everything works fine in winform, but I need (by user input) URL screen
captures for my asp.net pages using an ashx file.
So I tried to launch the Winform app in invisible mode, but CreateGraphic
return bitmap of the visible area only, so I get a piece of desktop
screenshot, not the web page screenshot.
I also tried to launch an invisible Internet Explorer instance but I can't
find a method like CreateGraphic.
Can anyone help me?
Thanks in advance for support,
Joe