Close\Minimize\Maximize buttons are missing

[caperover2000]

Hi All, I have a tricky question regarding the close\minimize\maximize buttons of a child frame. Hope someone can help.

I create an MDI Framework and then a child frame inside it with a few. For some reason, the close\minimize\maximize buttons of the child frame do not show up, and thus it cannot be minimized or closed.

However, it only happens if I use ShowWindow(SW_MAXIMIZE) in the child frame's OnCreate. Without this line it works fine.

Besides, I checked its style, both WS_MINIMIZEBOX andWS_MAXIMIZEBOX are set. That is why ModifyStyle does not help.

Can someone please shed some light?

Thank you!

[VictorN]

They are not not "missing". They are at the right top corner of the window, below the mainframe titlebar.

[caperover2000]

They are not not "missing". They are at the right top corner of the window, below the mainframe titlebar.

VictorN, yes, that is the right behavior I expect, but in my case they do not show even though both WS_MINIMIZEBOX andWS_MAXIMIZEBOX are set. See the picture

[VictorN]

But is it a "classic" MDi or some other type like tabbed document or something else?

[caperover2000]

But is it a "classic" MDi or some other type like tabbed document or something else?

It is a classic one. In fact, if I "cascade" them from the menu "Window" and then maximize them again, the buttons will appear normally.

It is kind of annoying. I am trying to figure out what flag is wrong in the beginning and what happened between "cascading" and "maximizing".

Thanks a lot!

[VictorN]

I have no idea... I never saw such strange behavior.

[caperover2000]

I have no idea... I never saw such strange behavior.

Thanks anyway. I have to use a hack to solve the issue for now.

[Arjay]

Here's something to try: Create a new MDI project using the new project wizard. Check yhe docking behavior of the MDI windows.

If it works in a new project, you'll know the problem is in your code. You can use spy++ to help determing styling differences between projects,