Code Snippet
System.Drawing.Design.
ToolboxItemCollection itemCollection = ((IToolboxService)toolbox).GetToolboxItems("PBIControls");
foreach (System.Drawing.Design.ToolboxItem toolItem in itemCollection)
{
toolItem.ComponentsCreated += new ToolboxComponentsCreatedEventHandler(OnControlAdded);
toolItem.ComponentsCreating += new ToolboxComponentsCreatingEventHandler(toolItem_ComponentsCreating);
}