can this be done? (Manager customizations)

Thanks for your reply. If I did a new form, would I still be able to use the existing table that is used in the current Customer Property screen? Would the form have to be compiled as an exe to be accessible from the Add-Ins menu? I didn't know you could just access an add-in from the menu in the Manager's screens - the customization guide has instructions on how to access an add-in from a POS button, but I thought the Manager add-ins had to be hooks that were invoked?

I looked at that, but I believe it said that exe add-ins will not have access to QSRules, which is what I still want access to in my customization.

Is this not the case - I can make an exe that has access to QSRules?

No, you can't add a button or any other controls to the built in screens.

You can use the SaveCustomer event to open a supplemental screen to capture your additional fields. As you note, this is going to happen in both Manager and POS.

You can write your own form to completely replace the Customer Properties form. You would call this from the Add-Ins menu in Manager or from a Custom POS Button in POS.

There's one page in the Customization guide regarding "Standard EXE Add-ins" that should answer your questions.

You can't pass an active session to that type of add in, but if you need QS Rules you can create your own instance of it - You'll have to manually connect it to the database though.