在弹出窗口中显示用户控件

I have a button and another control placed in a usercontrol I want to pop out the control below the button to the topp of all other controls when the bitton in the usercontrol is clicked

您可以举办任何类型的Control in a ToolStripControlHost https://msdn.microsoft.com/en-us/library/system.windows.forms.toolstripcontrolhost(v=vs.110).aspx然后将其添加到项目工具栏下拉菜单 https://msdn.microsoft.com/en-us/library/system.windows.forms.toolstripdropdown(v=vs.110).aspx然后显示下拉菜单：

Dim dropdown As ToolStripDropDown = New ToolStripDropDown()
Dim c As UserControl1 = New UserControl1()
Dim host As ToolStripControlHost = New ToolStripControlHost(c)
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) _
    Handles Button2.Click
    If (dropdown.Items.Count = 0) Then
        host.BackColor = Color.White
        host.Margin = New Padding(2)
        c.MinimumSize = New Size(120, 100)
        dropdown.Padding = New Padding(0)
        dropdown.Margin = New Padding(0)
        dropdown.Items.Add(host)
    End If
    dropdown.Show(Button2, 0, Button1.Height)
End Sub