I am using a 3rd party library for some GDI+ drawing capabilities where the method to actually implement the drawing takes a Graphics object and a Rectangle object as parameters. In the Paint event of my WinForms application I can then execute:
externalLibrary.Draw(e.Graphics, ClientRectangle);
When implementing the same thing in ASP.NET I can create a new Graphics object but is there an equivalent of ClientRectangle for a Page or WebUserControl?