Custom Web Control Problem

[alex_read]

I'm trying to desig a control for the 1st time & have this code:

Imports System.ComponentModel
Imports System.Web.UI
Public Class WebCustomControl1
	Inherits System.Web.UI.WebControls.WebControl
	Protected Overrides Sub Render(ByVal output As System.Web.UI.HtmlTextWriter)
		output.Write("<Table height=100% width=100% border=5><TR><TD>&nbsp;</TD></TR></TABLE>")
	End Sub
End Class

When I add this to a webform at design time, the control is locked to the right of the screen & only resizes left or vertically - I can't move it around freely or alter it's height or width like the default MS web controls (like a label or checkbox for example). How can I add this functionality please????