Hello,

I can think of two ways to do this:

1. You could put the control into an 'UltraControlContainerEditor' and assign the last as an EditorComponent to the column/cell.

ultraControlContainerEditor1.RenderingControl = numericUpDown1;
ultraControlContainerEditor1.RenderingControlPropertyName = "Value";
e.Layout.Bands[0].Columns[1].EditorComponent = ultraControlContainerEditor1;

You could read about the 'UltraControlContainerEditor' at the following links: 

http://help.infragistics.com/Help/NetAdvantage/WinForms/2011.1/CLR2.0/html/WinControlContainerEditor.html

and

http://help.infragistics.com/Help/NetAdvantage/WinForms/2011.1/CLR2.0/html/WinControlContainerEditor_Embed_Any_Control_within_WinGrid_Cell_using_UltraControlContainerEditor_Component.html

2. You could change the style of the column like in the following code sample:

e.Layout.Bands[0].Columns[0].Style = Infragistics.Win.UltraWinGrid.ColumnStyle.IntegerWithSpin;

Please do not hesitate to contact us if you need any additional assistance.