Fill a buffer with indexes
unsigned short *PtFSGetSelIndexes( PtWidget_t *widget, unsigned short *buffer );
This function fills a buffer with indexes of all the selected items in the PtFileSel 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 the buffer is zero-terminated.
If buffer is non-NULL, the function adds zero to the end only if there are no selected items in the widget.
A pointer to the buffer.