请教老师，下面代码写在窗口全局事件CLICK，打开窗口后，所有按钮下的PANEL都是打开的，只有点击按钮才能收缩起来

想实现：打开窗口后所有BUTTON下的PANEL都收缩起来，只显示BUTTON（这里不想使用QQ菜单的方式进行收缩）

我在窗口AFTERLOAD写入模拟点击按钮的代码，打开窗口后无法全部把PANEL收缩起来，只能收缩一部分，但是点击BUTTON（决策阶段，设计阶段...)都能正常收缩PANEL

Select Case e.Sender.Name
    Case "Button1","Button2","Button3"
        Dim Pnl As WinForm.Panel = e.Form.Controls("Panel" & e.sender.name.Replace("Button", ""))
        Pnl.Top = e.Sender.Top + e.Sender.Height + 1 
        Pnl.Visible = Not Pnl.Visible
              
        Dim Lbl As WinForm.Button = e.Form.Controls("Button1")
        For i As Integer = 2 To 3
            Pnl = e.Form.Controls("Panel" & i - 1)
            e.Form.Controls("Button" & i).Top = IIF(Pnl.Visible,Pnl.Top + Pnl.Height + 1,Lbl.Top + Lbl.Height + 1)
            Lbl = e.Form.Controls("Button" & i)
            e.Form.Controls("Panel" & i).Top = Lbl.Top + Lbl.Height + 1
        Next
End Select

那你尝试在sizechange事件写代码处理。