I'm using the similar idea in one of my applications... The code I have is:
// Update find/replace options
// Perform a find operation
resultSet = editor.SelectedView.FindReplace.Find(options);
If I step through this code in debug mode, with the Find Textbox set to [! ], the whole application crashes.
Error handling appears to not be handled properly by your Find() command.
Can you give me an idea ASAP on a work-around until it's fixed? I have to deliver my app soon and it is relying on your control.