如何使用按钮关闭 Visual Basic 中打开的表单？

Question

I am working on a game, and it has a simple menu system. One of the buttons, simply known as 'Button1', should close the menu form and load up the game window. While it opens the game window, it does not close the menu window. Is there a way to make it so that it closes one form and opens another.

Game window name = GameBoard

Menu window name = Form2

Code:

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    Dim Form2 As New GameBoard
    Form2.ShowDialog()
    Me.Close()
End Sub

Answer 1

The reason that the form is not closed is because Form2 is opened with ShowDialog() :

Form2.ShowDialog()
' This will not execute until Form2 is closed
Me.Close()

This will pause execution of the code in Button1_Click until after Form2 is closed, as per the docs for ShowDialog() :

Shows the form as a modal dialog box.

You could, alternatively, just do Form2.Show() , which would not open it as a dialog and allow the remainder of your code to run:

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    Dim Form2 As New GameBoard
    Form2.Show()
    Me.Close()
End Sub

Alternatively, close the current form before opening Form2 :

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    Dim Form2 As New GameBoard
    Me.Close()
    Form2.ShowDialog()
End Sub