fantastic, that worked! :) i was trying a lot of ways and read documentation of infragistics and google but a did not get the answer.

fortunately your code works perfect. this is my implementation if the tabs and groups already exists

        Dim container As New Infragistics.Win.UltraWinToolbars.ControlContainerTool("dateContainer")
        Dim datePicker As New DateTimePicker()
        container.Control = datePicker

        Me.UltraToolbarsManager1.Tools.Add(container)
        Me.UltraToolbarsManager1.Ribbon.Tabs(0).Groups(2).Tools.AddTool(container.Key, False)

You'll need to use a ControlContainerTool and set its Control property to that of your DateTimePicker. I've modified the code that was provided in that link to demonstrate how you would do this:

        Dim homeTab As New RibbonTab("Home")
        Me.UltraToolbarsManager1.Ribbon.Tabs.Add(homeTab)

        Dim dateGroup As New RibbonGroup("Date")
        Me.UltraToolbarsManager1.Ribbon.Tabs("Home").Groups.Add(dateGroup)

        Dim container As New ControlContainerTool("dateContainer")
        Dim datePicker As New DateTimePicker()

        container.Control = datePicker

        Me.UltraToolbarsManager1.Tools.Add(container)
        dateGroup.Tools.AddTool(container.Key, False)

i jason, tnx for your time and help.

but ... i read the article before asking and i didnt help me, the fact is that this article show how to add controls
but this.ultraToolbarsManager1.Tools.Add does not accept DateTimePicker's.

i tryed many ways but nothing works, i hope you can help. the problem is that "Tools.Add" just accept "baseTool" types