Thanks for the reply.  That solution is close to what I need but it makes all of the other columns in the UltaGrid have the identical cell padding or cell spacing which looks pretty bad...

This is the code I'm using - it adds some nasty gray space between the text content and the cell wall of all the other cells - I'm trying to eliminate that gray space with the else condition - I tried values of -1, 0 and 1 and all are ignored. 

else

I'm setting style of a column to Button.

Hi Eugene,

I'm confused. I tried this out and I set CellPadding on the override to 5 in a grid with a button column. But the padding has no effect on the button column. The button still fills the entire cell.

So what's the problem you are trying to solve?

Hi Mike,

The problem I'm trying to solve is to make button in column to not filling all the entire cell but at the same time all other column's content should fill all the cell.

Is it possible?

Oh, so you are doing the opposite of what the original poster in this thread asked. Okay... that's pretty easy to do with a CreationFilter.

        private void Form1_Load(object sender, System.EventArgs e)
        {         
            this.ultraGrid1.CreationFilter = new ButtonCreationFilter();
        }

    public class ButtonCreationFilter : IUIElementCreationFilter
    {
        void IUIElementCreationFilter.AfterCreateChildElements(UIElement parent)
        {
            if (parent is CellUIElement)
            {
                UIElement cellButtonUIElement = parent.GetDescendant(typeof(CellButtonUIElement));
                if (null != cellButtonUIElement)
                {
                    Rectangle rect = parent.RectInsideBorders;
                    rect.Inflate(-3, -3);
                    cellButtonUIElement.Rect = rect;
                }
            }
        }

        bool IUIElementCreationFilter.BeforeCreateChildElements(UIElement parent)
        {
            // do nothing
            return false;
        }
    }

Thank yo so much, Mike. It works fine.