You can drop a class or control on a window to make an instance there.
I assume you mean drag and drop from the toolbar with all the controls on the left.
As it doesn't have a window my control doesn't show up there.
So I assume I need to create a sub class and then drop that onto my window.
But there is something I don't get.
If there are multiple instances of this being created during run time... how do I know which instance generated the event?
There is only one instance on the window.