How can I make my form full screen with the TForm.FullScreen property?

Question

I am trying to use the FullScreen property of TForm in a FireMonkey app in Delphi, but FullScreen := true doesn't work.

Plus you did not answer which platform(s), i.e. are you having this issue when the app runs on Windows, iOS, Android etc? — Dave Nottage, Sep 09 '19 at 04:09
Just win32. I just added a button to test it and when i use fullscreen:=true; nothing happens. When I change the value from the properties the form goes to fullscreen when I run my program. — PanosDK, Sep 09 '19 at 04:14
Ok this is what I get when I try fullscreen:=true; E2010 Incompatible types: 'TMenuItem' and 'Boolean' — PanosDK, Sep 09 '19 at 04:19
Fullscreen is supposed to accept a boolean so I dont know whats wrong with it. — PanosDK, Sep 09 '19 at 04:20
Do you have a menu item named `fullscreen`? If so, change its name. — BrakNicku, Sep 09 '19 at 05:12
Thank you for helping me guys. @BrakNicku is right. I had a menu item named fullscreen. Problem solved. — PanosDK, Sep 09 '19 at 16:57

score 4 · Accepted Answer · answered Sep 09 '19 at 12:37

From information you've provided in comments:

Ok this is what I get when I try fullscreen:=true; E2010 Incompatible types: 'TMenuItem' and 'Boolean'

it appears you have a menu item whose name is fullscreen, and it's causing a scope mismatch. This would also explain why it works fine when you change the property in the Object Inspector, but won't compile when you try to do it in code.

Change the menu item's Name in the Object Inspector. The TMenuItem.Caption can be Fullscreen, but the Name should be something else that does not conflict with an existing property of the form itself.

Yes that was it. Thank you for helping. – PanosDK Sep 09 '19 at 16:58 — PanosDK, Sep 09 '19 at 16:58

How can I make my form full screen with the TForm.FullScreen property?

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