An x in the M (Modify) column means you can change the property. When (exp) is included in the description, you can specify a DataWindow expression as the value for that property.
Property for a computed field  | 
M  | 
Description  | 
|---|---|---|
x  | 
A description of the control for use by assistive technology tools.  | 
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x  | 
A descriptive label for the control.  | 
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A description of the kind of user-interface element that the control is.  | 
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x  | 
(exp) The alignment of the computed field’s text.  | 
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A list of the properties of the computed field.  | 
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x  | 
(exp) Background settings for the computed field.  | 
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The band containing the computed field.  | 
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x  | 
(exp) The type of border around the computed field.  | 
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x  | 
(exp) The text color.  | 
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The column’s datatype.  | 
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x  | 
(exp) Determines whether a button control on a DataWindow is enabled.  | 
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x  | 
The expression for the computed field.  | 
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x  | 
Determines whether a rectangle displays around the selected control.  | 
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x  | 
(exp) Font settings for the computed field.  | 
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x  | 
(exp) The computed field’s display format.  | 
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x  | 
(exp) The height of the computed field.  | 
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x  | 
Whether the computed field’s height is adjusted to fit the data.  | 
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x  | 
Whether the control appears once per page when printing newspaper columns.  | 
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x  | 
(exp) Settings for creating hyperlinks for the computed field.  | 
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x  | 
Whether the user can move the computed field.  | 
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The name of the computed field.  | 
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x  | 
(exp) The pointer image when it is over the computed field.  | 
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x  | 
Whether the user can resize the computed field.  | 
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x  | 
(exp) Whether the computed field moves left to fill in space.  | 
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x  | 
(exp) How the computed field moves up to fill in empty space.  | 
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x  | 
The position of the computed field in the tab order.  | 
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x  | 
(exp) The tag text for the computed field.  | 
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The control’s type, which is Compute.  | 
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x  | 
(exp) Whether the computed field control is visible.  | 
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x  | 
(exp) The width of the computed field.  | 
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x  | 
(exp) The x coordinate of the computed field.  | 
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x  | 
(exp) The y coordinate of the computed field.  |