Question

Can I create a control that has 2 menu’s characteristic:

• Do not take form’s focus on clicking.
• Automically disappear when clicking outside.

I intend to draw it manually, but I realise I can’t draw outside of form’s border like system menu.

Answer 1

You are describing the ToolStripControlHost, which can contain any control you want. Paired with the ToolStripDropDown, and you have a very effective custom drop down control that will not take focus from the main form, and will close when clicked outside of it:

Dim toolDrop As New ToolStripDropDown()
Dim toolHost As New ToolStripControlHost(myControl)
toolHost.Margin = New Padding(0)
toolDrop.Padding = New Padding(0)
toolDrop.Items.Add(toolHost)
toolDrop.Show(Me, New Point(0, 0))

Whatever myControl is, sometimes you have to set the MinimumSize of it equal to the size of the control. There are events you can handle for the ToolStripDropDown such as, Opening and Closing.