In Visual foxpro it was quite normal to create an object based on another object

For instance An OK button based on a button that shut down that form
or A Form with all the necessary buttons and other controls to carry out a task that is similar to other tasks

You would then drop that object on whatever was required and it would work with very little programming

Is this a standard OOPs practice available in Dot Net or am I barking(mad) upthe wrong tree

Richard