How to use placeSortArrow in datagrids ?

What is the right way to use placeSortArrow() in dataGrids ?
The documentation says :" Draw the sortArrow graphic on the
column that is the current sortIndex."
But now, how to set the "curernt Sort Index", there is
actually no property for that.
I tried also to set an undocumented dataGrid attribute -
sortColumn - to be the column on which I do the sort, then to call
placeSortArrow(), but nothing is drawn...
Does somebody know how to use this function ?
Thanks

Try the following:
const char *nameVal = "русский";
XmlData data((void *)nameVal, strlen(nameVal));
XmlQueryContext qc = mgr.createQueryContext();
XmlValue nodeName(XmlValue::STRING, data);
qc.setVariableValue("name", nodeName);Lauren Foutz

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