Opacity on MDI child form

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Good Day Fellas, I'm working right now on MDI application. I just want to ask if it is possible to change the opacity of the child form whenever it is loaded. I will put this code whenever the user move the active child form. Thank You.

Posted 28-Aug-13 18:18pm

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BillWoodruff 29-Aug-13 5:47am

There are a lot of people still using MDI solutions in WinForms, and you may well have been assigned to, or tasked with, creating what you describe here. However, I would encourage you to forget the idea of having a usable MdiChildForm with variable transparency, if possible. I have never seen yet seen a solution to doing this that does not have some strange problem at run-time which is just visually acceptable.

MDI architecture has been "deprecated" by Microsoft some years ago.

Unfortunately, the other alternatives are about just as bad. Putting a Form inside another Form by setting the Form to be the Parent of the other Form is a bad practice, and the Form that is now 'Parented will not use its Opacity setting. Creating a new Form, with no Parent, well, yes, you can set its Opacity as you like, but then that means that its TitleBar, and other native Form Controls (CloseBox, MinimizeBox, MaximizeBox) will share the Form's Opacity. And, if you use multiple independent Forms (something I do regularly), then, if you wish to simulate their behaving like MdiChildForms, you are in for a lot of work: imho not worth the effort, and a bad idea.

Trying to make a Panel in WinForms variably transparent, and usable is also, in my experience, going to make a mess.

"Opacity" in WinForms has never really been equivalent to what most people expect from the word "Transparency," and neither is using 'TransparencyKey along with 'BackColor.

I'd like someone to prove that everything I just said was incorrect :)

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Priyanka Bhagwat · Answer 1 · 2013-08-28T21:23:00

Solution 2

HI...

Here is the Link

Cant able to make mdi child as transparent[^]

Hope this Helps you

Happy Coding :) :)

Posted 28-Aug-13 21:23pm

Priyanka Bhagwat

Sergey Alexandrovich Kryukov · Answer 2 · 2013-08-28T18:31:00

Here is the idea: who needs MDI, ever? Why torturing yourself and scaring off your users?
Do yourself a great favor: do not use MDI at all. You can do much easier to implement design without it, with much better quality. MDI is highly discouraged even by Microsoft, in fact, Microsoft dropped it out of WPF and will hardly support it. More importantly, you will scare off all your users if you use MDI. Just don't. Please see:
http://en.wikipedia.org/wiki/Multiple_document_interface#Disadvantages[^],
How to Create MDI Parent Window in WPF?[^].

I can explain what to do instead. Please see my past answers:
How to Create MDI Parent Window in WPF? [Solution 2],
Question on using MDI windows in WPF[^],
MDIContainer giving error[^],
How to set child forms maximized, last childform minimized[^].

—SA