>This is just a sample. To make it generic, you have to add checking for ActiveX controls, OLEBoundControl (you cannot compare field of General type) etc.

One other thought: you checked for the possibility of a grid, but anyone who uses pageframes would also have to check for a pageframe, and a grid within it ... in fact, you might need a form method like "RealActiveCtrl" which "drills down" through any active container objects into the lowest active non-container object.

To be really generic.

I bet the commercial frameworks all have something like this.