Autocomplete Match on Contains, not StartsWith

I have a ToolStripTextBox, using it for a filter for a SQL Query.

If I have the list:

Apple, Orange, Pineapple

The suggest and append features will pick out "Apple" when I filter for "App".

I want to alter the Suggest part to include "Pineapple" also (match on string.Contains, not just string.Startswith)

Is there a way to intercept something like OnSuggestFiltering(), or whatever routine handles the filter?

I'd rather live with false hope than with false despair.