Question

Is it possible to open a form more than once?

button1
form2.show

Press button1
form2 opens up

press button1 again
another form2 opens up next to the old form2

If possible, can a button on Form1 kill all Form2 windows open?

Answer 1

Of course it’s possible. Just dim two instances of the same form.

Public Class Form1

    Private m_WindowList As New List(Of Form2)

    Private Sub OpenWindowButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OpenWindowButton.Click
        OpenWindow()
    End Sub

    Private Sub CloseWindowsButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CloseWindowsButton.Click
        CloseWindows()
    End Sub

    Private Sub OpenWindowsButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OpenWindowsButton.Click
        Dim WindowCount As Int32
        If Int32.TryParse(WindowCountTextBox.Text, WindowCount) Then
            OpenWindows(WindowCount)
        End If
    End Sub

    Private Sub OpenWindow()
        Dim NewWindow As New Form2
        m_WindowList.Add(NewWindow)
        NewWindow.Show()
    End Sub

    Private Sub OpenWindows(ByVal Count As Int32)
        For i = 1 To Count
            OpenWindow()
        Next
    End Sub

    Private Sub CloseWindows()
        For Each Window In m_WindowList
            Window.Close()
            Window.Dispose()
        Next
        m_WindowList.Clear()
    End Sub

End Class