How do you open another form with out creating another instance

i'm using hide and close events from form. but what i found out is it creates every time another instance
this is the code i used

Dim AFormInstance As New form1()
AFormInstance.Show()
Me.Hide()

How to get 1 instance instead of many?

Declare a class-level variable instead of a procedure-level one.

Code:

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Public Class MyForm
    Inherits System.Windows.Forms.Form

    Public FRM as new Form()

    Public Sub ShowFRM()
   
          FRM.Show()

    End Sub

End Class

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Something like this should work just fine.

Quote:

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Originally posted by Edneeis:

I think you have to track the forms at a module level or pass references of the instances back and forth to the different forms.

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I disagree. Passing references like that would only lead to spaghetti code. It can be done, but your code would be a bit harder to read, and harder to debug if you have a lot of forms.

I think you have to track the forms at a module level or pass references of the instances back and forth to the different forms.

If you want to pass data back and forth, you will need a reference to do so or another class that acts as an intermediatery (spell) between the two. Edneeis is right.

Quote:

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Originally posted by hellswraith
If you want to pass data back and forth, you will need a reference to do so or another class that acts as an intermediatery (spell) between the two. Edneeis is right.

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Hmm. With an application that has a lot of forms, it might get difficult to keep track of all those form references.

I like the idea of a shared class acting like an intermediatery though. It would help to keep things centralized and simple.