如何在VB.NET中打开另一种形式的表单？

Question

我认为这很容易.我没有那么多地使用VB.NET,我试图通过点击按钮打开一个表单.表单将不会显示,我得到一个null异常错误.

代码有什么问题？

Private Sub Button3_Click(sender As System.Object, e As System.EventArgs) Handles Button3.Click
    Dim A
    A = AboutBox1
    A.Show()
End Sub

Answer 1

Private Sub Button3_Click(sender As System.Object, e As System.EventArgs) _
                          Handles Button3.Click

    Dim box = New AboutBox1()
    box.Show()

End Sub