please download the follwing custom control source code
http://www.codeproject.com/Articles/12421/The-Grouper-A-Custom-Groupbox-Control
Build / add to sharpdevelop controls as normal
Drag and Drop the "Grouper" Icon from toolbox to the form window will add nothing !!
using visual studio was ok.
SharpDevelop Version : 4.2.0.8528-beta-5a10682e
.NET Version : 4.0.30319.239
OS Version : Microsoft Windows NT 6.1.7601 Service Pack 1
Current culture : Arabic (Syria) (ar-SY)
Current UI language : en
Working Set Memory : 139748kb
GC Heap Memory : 29115kb
best regards.