how to refresh screen from a dialog box

[wesbird]

Hi,
I have a listbox in dialog box. I list some selected hatch handle in this listbox. When I click on any hatch item in the listbox, I put code to change the color of hatch. The color does not get changed until I move the dialog a little. In VBA, I use Hatch.Update to fresh screen. but I can not find the method in .NET. How I can do it?
I also tried to refresh screen by
Viewport v = new Viewport();
v.UpdateDisplay()
but how I can create a acitve Viewport?


Thank you very much.
Wes

[wesbird]

I found it:
Autodesk.AutoCAD.ApplicationServices.Application.UpdateScreen