My parent MDI form (MDIForm1) has opens various child forms on their respective menu click events.
I want to know that :
1) How will I check if a particular child form is already open?
2) On closing the MDIForm1 if any of the child forms are open then it must popup a message box and wait until the user manually closes each and every child form before closing the parent MDIForm1. How should i do this?