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I have custom windows form that has no border.I apply that custom form on child form. And I have custom MDIParent Form that has also no border. So, My problem is when I maximise child form then top border of is appear out side of MDIForm so how can manage or solve this issue using c#.See my snapshot for more detail of my problem I want to remove border with maximise button from top of the custom MDIForm.

What I have tried:

I tried many solution available on stack overflow and many other web site.
Updated 14-Sep-16 8:11am
Member 12578086 14-Sep-16 3:17am    
Snapshot Link :

1 solution

Hi Member,

Not really a solution just some hacky but maybe acceptable workarrounds can be found here c# - Removing the default MDI menu of a MDI Container form when a MDI Child is maximized - Stack Overflow[^]

But you maybe allready have seen this "Solutions"...

I just wanted to share my experience with applications like yours (borderless forms with custom/simulated system menu):
After Messing arround with MDIContainer and Forms I decided to implement my own logic - It's not that difficult if you just want to "simulate" normal window behavior - think about it - just some simple positioning logic. The Sub-forms where UserControls just layered on top of each other (in normal Z-Order) on the main-form. And I left all the hassles with MDI behind me...

Kind regards
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