Hello,

     I'm troubled in writing an form add-in which has a face selection in OnNewSelection Eventhandler, there is a listbox in the form, and if user select a face a messeage something like "Face #1" added in the listbox and the face is added in a facelist which will be used in the add-in.

     Now the question is user may need to select more than one face, and when user select a new face or deselect a face aready in the facelist how can I show these changes in display? Is there anyway to make a face blue as if selected but not really select and undo this whenever need?