property Items.CellSortData([Item as Variant], [ColIndex as Variant]) as Variant

Specifies the cell's sort data.

TypeDescription
Item as Variant A long expression that indicates the item's handle
ColIndex as Variant A long expression that indicates the cell's handle or the column's index, a string expression that indicates the column's caption or the column's key.
Variant A long expression that indicates the cell's sort data.

The CellSortData property specifies the value being sorted if the SortType property is SortCellData or SortCellDataString. Use the CellData property to associate an extra data to a cell. Use the CellValue property to specify the cell's value. Use the CellCaption property to get the string being displayed in the cell.

Note: The intersection of an item with a column defines a cell. Each cell is uniquely represented by its handle. The cell's handle is of HCELL type, that's equivalent with a long type. All properties of Items object that have two parameters Item and ColIndex, refer a cell.

The following lines are equivalents and each of them changes the bold font attribute of the first cell on the first item.

With Grid1
    .Items.CellBold(, .Items.ItemCell(.Items(0), 0)) = True
    .Items.CellBold(.Items(0), 0) = True
    .Items.CellBold(.Items(0)) = True
    .Items.CellBold(.Items.ItemByIndex(0)) = True
    .Items.CellBold(.Items.ItemByIndex(0), 0) = True
    .Items.CellBold(.Items(0), Grid1.Columns(0).Caption) = True
End With