按钮响应事件的代码 Protected sub Button1 Click(Byval sender As Object, ByVal e As System EventArgs) Handles Bu七七on1,C1ick Labell Text = Hello World! I End Sub31 按钮响应事件的代码 Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click Label1.Text = "Hello, World!" End Sub