How to simulate a drop-down window in WinForms?

Question

i know a Windows Combobox control is nothing but a Textbox and a ListBoxglued together.

i need to simulate the same thing in WinForms. i am trying to fi

Answer 1

Using a ToolStripControlHost and a ToolStripDropDown can achieve the same effect.

From this answer:

Private Sub ShowControl(ByVal fromControl As Control, ByVal whichControl As Control)
  '\\ whichControl needs MinimumSize set:'
  whichControl.MinimumSize = whichControl.Size

  Dim toolDrop As New ToolStripDropDown()
  Dim toolHost As New ToolStripControlHost(whichControl)
  toolHost.Margin = New Padding(0)
  toolDrop.Padding = New Padding(0)
  toolDrop.Items.Add(toolHost)
  toolDrop.Show(Me, New Point(fromControl.Left, fromControl.Bottom))
End Sub