Question

I have a main form, which opens form A, where from form A I can open form B, where from form B I can open form C. The problem is that if I open till form B, everything works fine, but if I open form C as well, and then close Form C and B, form A goes behind the main form. For the forms I m just creating an instance of the form and then use .Show()

cNewForm form = new cNewForm();
form.Show();

I m doing this for every form

Answer 1

You have not set the window ownership properly because you are using the no parameter version of Show(). You need to set the owner by calling the Show() overload that receives an owner parameter. Alternatively you can set the Owner property directly, but it’s much better to do so when you call Show().

The window owner is an important Win32 concept. I recommend reading the MSDN documentation on the subject.

• An owned window is always above its owner in the z-order.
• The system automatically destroys an owned window when its owner is destroyed.
• An owned window is hidden when its owner is minimized.

In your case I think you want form A to be owned by your main form, and form B to be owned by form A, and form C to be owned by form B.