Use the ClearBackColorChild method to clear the background color of the child nodes. Use the BackColorChild property to specify the child node's background color. Use the ClearBackColor method to clear the node's background color.

The following sample changes the node's background color while cursor hovers the control:

Dim nOld As EXMLGRIDLibCtl.Node
Private Sub XMLGrid1_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
    With XMLGrid1
        Dim n As EXMLGRIDLibCtl.Node, h As EXMLGRIDLibCtl.HitTestEnum
        h = .HitTest(X / Screen.TwipsPerPixelX, Y / Screen.TwipsPerPixelY, n)
        If Not nOld Is n Then
            If Not nOld Is Nothing Then
                nOld.ClearBackColor
                nOld.ClearForeColor
            End If
            If Not h = 0 Then
                n.BackColor = vbGreen
                n.ForeColor = vbBlue
            End If
        End If
        Set nOld = n
    End With
End Sub