James,

>Anyone know how I can implement the click event for the button component that's embedded in the mmOpenFileDialog control?
>
>I worked out how to use the index into the Controls collection to access the properties, name, text, etc. but I'd like to use the click event to do some validation.

Have you created a subclass of the mmOpenFileDialog that you're using? If you can let me know more details about what you want to accomplish I can give you more specific advice.

Best Regards,