How to get the handle of the topmost form in a WinForm app?

Question

I have a WinForm app that has other child forms (not mdi). If the user presses \"Esc\" the topmost form should be closed even if it doesn\'t have the focus.

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Answer 1

I know this is a 4 yr old thread, but I had a similar problem and just came up with an alternative solution just in case anyone else stumbles on this question and doesn't want to mess around with Win32 calls.

I assume the top-most form will be the one that was last activated. So you could keep a separate collection of forms, similar to Application.OpenForms, except this collection would be ordered by when each was last activated. Whenever a form is activated, move it to the first item of the collection. Whenever you see the ESC key, you would close collection[0] and remove it.