设置ClassLibrary c＃中存在的Windows窗体的所有者

Question

I have ClassLibrary that have a Windows Form named LookUpBox . I want to Call LookUpBox from my application and set my application as owner of that and do it as blow:

LookUpBox foo = new LookUpBox();
foo.Owner = this;
foo.ShowDialog();

But when Run my application and press Alt + Enter I see 2 form like :

I excepted with set of Owner of the foo , I see single Window with Alt + Enter . Anybody know how to solve this problem? Thanks in advance

Answer 1

Window.Owner states:

When you open a child window by calling ShowDialog, you should also set the Owner property of the child window. If you don't, then your users won't be able to restore both child window and parent window by pressing the task bar button. Instead, pressing the task bar button will yield a list of windows, including both child and parent window, for them to select; only the selected window is restored.

Form.Owner states:

When a form is owned by another form, it is closed or hidden with the owner form. For example, consider a form named Form2 that is owned by a form named Form1. If Form1 is closed or minimized, Form2 is also closed or hidden.Owned forms are also never displayed behind their owner form. You can use owned forms for windows such as find and replace windows, which should not disappear when the owner form is selected. To determine the forms that are owned by a parent form, use the OwnedForms property.

So what you need to do is to explicitly set foo.ShowInTaskbar = False to keep it hidden from taskbar