I have now got a related problem.

The event fires exactly as described however I keep getting a null exception when trying to use the following example code in the Infragistics help.

The code works fine when I resize the column by dragging the headers but when I resize the column by dragging the column divider on a row header is null and causes an exception.

When I simply out put type using e.RowLayoutItem.GetType() it returns Infragistics.Win.UltraWinGrid.RowAutoSizeLayoutManagerHolder+CellLayoutItem

private void ultraGrid1_AfterRowLayoutItemResized(object sender, Infragistics.Win.UltraWinGrid.AfterRowLayoutItemResizedEventArgs e)
{
    Debug.Write( "AfterRowLayoutItemResized: " );

    if ( e.RowLayoutItem is UltraGridColumn )
    {
        // If the RowLayoutItem is an instance of UltraGridColumn, then cells associated
	// with that column are being resized.
	UltraGridColumn column = (UltraGridColumn)e.RowLayoutItem;

	Debug.Write( "Cell in row-layout resized. Column = " + column.Header.Caption );

    }
    else
    {
	// If the RowLayoutItem is an instance of HeaderBase, then column header (also 
	// referred to as column label) is being resized.
	HeaderBase header = (HeaderBase)e.RowLayoutItem;

	Debug.Write( "Header in row-layout resized. Header = " + header.Caption );
    }

    Debug.WriteLine( " New Size = " + e.RowLayoutItem.PreferredSize.ToString( ) );

}

I need to know which column has been resized. Any help greatly appreciated.

Hello again,

I am happy that you got it working.

Please do not hesitate to ask if something comes up.

Thanks Boris,

That did the trick nicely.