NIL is valid value for reading only. A run time error results, if an attempt is made to assign NIL to the :selTabCount instance variable.
Member variable XbpRtf():selTabCount Foundation
Specifies the number of tab stops defined for the text following the current selection or insertion point.
Attribute: EXPORTED
Data type: Numeric (0)
Description
The :selTabCount property contains a numeric value with the number of tab positions currently defined. The position of an individual tab position can be set using method:selTabs().
If the text in the current selection contains sections with different tabulator settings, the instance variable :selTabCount contains the value NIL. This value represents an indeterminate state that the Xbase++ application may chose to visualize in its user interface. Some word processor applications use grayed controls to visualize conflicting properties in the current selection, for example.
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