Get the indexes of the selected items
unsigned short *PtGenTreeGetSelIndexes( PtWidget_t *widget, unsigned short *buffer );
This function fills a buffer with indexes of all the selected items in the widget. The first item in the widget has an index of 1, not 0.
If buffer is NULL, the function allocates a buffer using malloc(), and terminates the buffer with a zero.
If buffer isn't NULL, the function adds a 0 to the end only if there are no selected items.
A pointer to the buffer containing the indexes.