Checks the synchron state of the header control in the list box.
bool IsHeaderInSynchronState (void) const;
Return Value
true if the header items are automatically synchronized
with the corresponding tabulator fields, otherwise false.
Description
If the isSynchron state is set to true on the list box header,
the properties of the header items are synchronized with the corresponding
tabulator fields by DG, otherwise they should be handled independently by the application.
These properties are: the number and size of the header items, the font style and size,
the alignment, the truncation of the text of the header items.
If this flag is set, these properties are automatically updated when a property of
a tabulator field is changed.