The CellCaption property specifies the cell's content. To associate an user data for a cell you can use CellData property. Use the CaptionFormat property to use HTML tags in the cell's caption, or to specify a computed field .  Use the ItemData property to associate an extra data to an item. To hide a column you have to use Visible property of the Column object. The Add method specifies also the caption for the first cell in the item. Use the <img> HTML tag to insert icons inside the cell's caption, if the CaptionFormat property is exHTML. For instance, the "some image <img>1</img> other image <img>2</img> rest of text", displays combined text and icons in the cell's caption. Use the Images method to load icons at runtime. Use the ConditionalFormats method to apply formats to a cell or range of cells, and have that formatting change depending on the value of the cell or the value of a formula.

The Caption property is interpreted in different ways, based on the CaptionFormat property as follows:

• exText, the Caption property indicates just a plain text
• exHTML, the Caption property indicates a text that may include HTML format. The CaptionFormatEnum property indicates the built-in HTML tags that are supported.
• exComputedField, the Caption property indicates the formula to compute the cell. Use the ComputedField property to specify a formula for the entire column.

If the CaptionFormat property is exComputedField, the Caption property may may include variables, constants, operators or ( ) parenthesis.  A variable is defined as %n, where n is the index of the column ( zero based ). For instance, the %0 indicates the first column, the %1, indicates the second column, and so on.  A constant is a float expression ( for instance, 23.45 ). 

The property supports the following binary arithmetic operators:

• * ( multiplicity operator ), priority 5
• / ( divide operator ), priority 5
• + ( addition operator ), priority 4
• - ( subtraction operator ), priority 4

The property supports the following unary boolean operators:

• not ( not operator ), priority 3 ( high priority )

The property supports the following binary boolean operators:

• or ( or operator ), priority 2
• and ( or operator ), priority 1

The property supports the following binary boolean operators, all these with the same priority 0 :

• < ( less operator )
• <= ( less or equal operator )
• = ( equal operator )
• != ( not equal operator )
• >= ( greater or equal operator )
• > ( greater operator )

Obviously, the priority of the operations inside the expression is determined by ( ) parenthesis and the priority for each operator. The property may be a combination of variables, constants and operators.

Samples:

1. "1", the cell displays 1
2. "%0 + %1", the cell displays the sum between cells in the first and second columns.
3. "%0 + %1 - %2", the cell displays the sum between cells in the first and second columns minus the third column.
4. "(%0 + %1)*0.19", the cell displays the sum between cells in the first and second columns multiplied with 0.19.
5. "(%0 + %1 + %2)/3", the cell displays the arithmetic average for the first three columns.
6. "%0 + %1 < %2 + %3", displays 1 if the sum between cells in the first  two columns is less than the sum of third and forth columns.