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  | 
M  | 
Description  | 
|---|---|---|
A list of the properties of the control.  | 
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x  | 
(exp) Background settings for the control.  | 
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The band containing the control.  | 
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x  | 
(exp) Settings for fill pattern and color.  | 
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x  | 
(exp) The height of the control.  | 
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x  | 
Whether the control appears once per page when printing newspaper columns.  | 
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x  | 
Whether the user can move the control.  | 
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The name of the control.  | 
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x  | 
(exp) Appearance settings of the control.  | 
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x  | 
(exp) The pointer image when it is over the control.  | 
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x  | 
Whether the user can resize the control.  | 
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x  | 
(exp) Whether the control moves left to fill empty space.  | 
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x  | 
(exp) How the control moves up to fill empty space.  | 
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x  | 
(exp) The tag text for the control.  | 
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The control’s type, which is ellipse, rectangle, or roundrectangle.  | 
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x  | 
(exp) Whether the control is visible.  | 
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x  | 
(exp) The x coordinate of the control.  | 
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x  | 
(exp) The y coordinate of the control.  |