I have a question regarding subclassing. For ease of reading I will use an over-simplified example:

I have a base form called frmBase from which I create a new class called frmData, these are both very generic classes which could be used by multiple apps.

If I create a new app, theory suggests I should subclass these again for my new application, let's call it APP. If I extend frmBase to the new application and call it APPBase, then extend frmData to APPData I have a problem because any changes I make to APPBase will not be reflected in APPData.

Hopefully I have explained this clearly enough. There is no urgency here, just for my own understanding.

TIA
Craig.