Hitendra,

There is some code somewhere in the inheritance tree that is causing this to happen. VFP easily handles two to three times the inheritance depth you have. You can actually create class hierarchies that are several hundred layers deep.

You are going to have to dig through the code to find what is at the root of the problem.

>I never get this pronlem with forms using VFP baseclasses. I dont get this problems with other VFP forms using these same classed controls. The only difference between this form and the other forms is that this form and its controls both are deep in hierarchy i.e. they are sub-classes at more than 2 levels away from baseclass. I think this is having big overhead when loading the form and so VFP is unable to refresh this form. A forced refresh due to Alt-Tab or Minimise/Maximise makes it refresh the form correctly.