closing all forms in vb.net

Formname.close()

When starting a project I always setup a method (Sub/Function) to initailize the application (called "OpenApplication()") to make sure everything the app needs is available when the user interface appears, and one to close the app, (usually called "CloseApplication()") to make sure everything is closed and/or disposed when the user closes the app. You should put each of these methods in a Shared Class or Module so they're available from any call and then instead of using Me.Close() on each form, just call the CloseApplication() function, which should contain the code to close each of your forms. If you don't KNOW the names of the forms used in your app (if you've created one or more dynamically) you can loop through all forms in the app like this:

For Each f As Form In My.Application.OpenForms
f.Close()
Next

Hope this helps!

Or Application.current.quit
I can't remember which.

My bad... should have included the application properties setting for startup form and shutdown. However, to answer your question about implementing the CloseApplication code in a module, just create a new Module and add something like this:

Friend Sub CloseApplication()

Try
For Each f As Form In My.Application.OpenForms
f.Close()
Next

'add any other closedown code here...

Catch

End Try
End Sub

Then on the Form_Closing event of each form, add some code to check to see if it needs to save its data.

And one moe comment... I do this for two reasons: 1) the module, if kept generic enough, is always reusable in any project; 2) It's easier to maintain code when it's off the forms and in one place. After all, code is EASY to write.... can be tough to MAINTAIN in a production environment.

Happy coding!