Source code:
Private sub button1_click (byvale as system.Object, byval e as system.eventargs) Handles Button1.Click Dimf2 As New Form2 frm2.show ()
End Sub
This will generate a new Form2 window each time you click on the button.
After modification
DIM F2 AS New Form2
Private sub button1_click (byvale) Handles Button1.click if f2 is nothing or f2.isdisposed THEN
F2 = new form2
END IF
F2.show ()
End Sub