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I am asking this, because i want to know if when we are running an app, for start if we have an window to authenticate like a Log In window, after validating the user, can we open the Main Window in the same Thread without creating a new one?
I am trying to do this in WPF, but i think that is same thing in WPF or in Windows Forms.
When you generate a Windows Forms application via the IDE, it will generate the code for one form, as well as a Main function that displays the form at runtime. You can rewrite the Main method so it displays one form modally then displays the next form.
But there’s a simpler way to achieve your objectives:
Have two windows: your Main window, where most of the work is done, and the login screen.
In the OnLoad event of your main window, create an instance of your login window and call ShowModal() on this instance.
If the login fails, then exit the application.