How to reference an existing object in VB.net?

Question

How do you reference an existing object in vb.net?

To describe my problem more specifically, I have my main form

Form1

that loads when I start the application.

Form1

has a datagridview

dgv1

. I have another form

form2

in the project with a bunch of textboxes. On clicking a button on

Form1

I create an instance of

form2

. From

form2

how do I reference the existing

form1

to populate

dgv1

with input from the texboxes on

form2

?

Answer 1

You need to pass a reference-to-Form1 to Form2. Use the Me keyword to get a reference to the object currently executing:

In Form1.vb:

Sub Form1_OpenForm2()

    Dim form2 As New Form2()
    form2.AcceptForm1( Me )
    form2.Show()
End Sub

In Form2.vb:

Private _form1 As Form1

Public Sub AcceptForm1(form1 As Form1)
    _form1 = form1
End Sub

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