Setting the owner of a dialog box in WinForms and C#?

Thursday, June 11, 2009 by Nate Bross

Someone asked on Stack Overflow:

I have an EXE (app.exe) that calls a COM exposed method in a C# DLL (lib.dll). Lib.dll shows a dialog box.

How do I make the dialog box (not a windows message box) recognize the app.exe as the owner, so that when app.exe is minimized, so is the dialog from lib.dll?

The dialog cannot be modal.

Is this a problem that can be solved with Winforms? I prefer a Winforms solution, but will be satisfied with a XAML solution if necessary.

I posted the following answer, which was chosen as the accepted answer and received 2 upvotes:

I assume your C# Dll is just creating an instance of a form and calling the .Show() method. If that is the case, in your COM exposed method should take an hWnd parameter and set the forms owner to that hWnd.

Originally posted on Stack Overflow — 2 upvotes (accepted answer). Licensed under CC BY-SA.