On a recent project I was tasked with building a custom grid server control. The grid made use AJAX (Client Side Java Script) to avoid post backs. I wanted change the ugly default toolbox icon used in Visual Studio. I thought it would make sense for my server control to use the same icon as the DataGrid since my control is a custom grid. This will allow developers to easily recognize it. I achieved my goal as follows:
<ToolboxData("<{0}:CustomGrid runat=server></{0}:CustomGrid>"), Designer(GetType(IDEInterface)), ToolboxBitmap(GetType(DataGrid))> _
Public
Class CustomGrid