Block the drag/float of CommandBar

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I have a CommandBars control, named CB.
Then I create a toolbar as code below

    Dim cToolbar As CommandBar
    With CB
        .DeleteAll
        .VisualTheme = xtpThemeRibbon
        .EnableCustomization False
        .Options.ShowExpandButtonAlways = False
        .Icons.LoadBitmap gsIcons16x16, gaArray16x16, XtremeCommandBars.XTPImageState.xtpImageNormal
        Set cToolbar = .Add("Toolbar", xtpBarTop)
    End With
    With cToolbar
        .SetIconSize 16, 16
        .ShowGripper = False
        .Customizable = False
    End With

I don't want that the user drag and/or float out the toolbar, cToolbar should be blocked.
But I don't find a property for this.

How do?

Thank.