Trying to tell if mouse is over open toolstripmenu or contextmenuitem when mousewheeling

Question

I have a Winforms app with a Toolstrip and Datagridview.

I'm attempting to implement MouseWheeling on the ToolStripMenuItems based on some information here:

• StackOverflow: Mouse wheel scrolling Toolstrip menu items

I have added a Mousewheel event to the DataGridView as adding one to the base form didn't fire. My problem is that I can't find a way to detect when the mouse cursor is over an open ToolstripMenu, it always says that it's over the DataGridView.

I have tried several different approaches including the current code:

    Public Shared Function FindControlAtPoint(container As Control, pos As Point) As Control
        Dim child As Control
        For Each c As Control In container.Controls
            If c.Visible AndAlso c.Bounds.Contains(pos) Then
                child = FindControlAtPoint(c, New Point(pos.X - c.Left, pos.Y - c.Top))
                If child Is Nothing Then
                    Return c
                Else
                    Return child
                End If
            End If
        Next
        Return Nothing
    End Function

    Public Shared Function FindControlAtCursor(form As Form) As Control
        Dim pos As Point = Cursor.Position
        If form.Bounds.Contains(pos) Then
            Return FindControlAtPoint(form, form.PointToClient(Cursor.Position))
        End If
        Return Nothing
    End Function

1 Mouse wheel scrolling Toolstrip menu items