Hi, Tim,
I tried your code.
Based on my reading of your explanation, specifically the phrase "your form", I placed the code you suggested in my modified mmMaintenanceForm. If I have misunderstood, please advise.
Regardless, that didn't work.
I then tried the equivalent code in the end user form in my application.
That didn't work either.
I have verified that the code does not execute in either case.

I have also verified that mmButtonCancel_Click in mmButtonCancel.cs and CancelHandler in mmButtonHelper do execute, as expected.

I also tried Kevin's suggestion, in the modified mmMaintenanceForm and in my end user form.
No joy there either.

I'm a long time Fox developer who's now learning .Net. If I was trying this in VFP it would be a couple of lines of obvious code and I'd be done. What makes it so difficult using .Net?

Sorry for the kvetch. It seems like this should be dead easy and it's proving to be anything but. It's frustrating.

As usual, any further suggestons or help will be much appreciated.

Thanks,
Frank