I have MDIForm and some ChildForms in it. When user click maximize button in
one of child form, I want to be alerted that user has just been clicked max
button.
My purpose to do this, I want to set property Sizing Grip in status bar on
that child form to be false when it's maximized.

fyi:
I did catch the event(after user click Max button in child form) in event
Form.Resize(). But I get confused to know whether it's maximized or not. I
tried to compare Maximize size between the one that I got from user and the
other one that from System.Windows.Form.SystemInformation.MaxWindowTrackSize.
But they are different, so I can not use the one from SystemInformation.

Any solution for this? Great thanks for any help!!
Deasy