EM_QUERYSEL - Syntax

This message gets the zero-based offsets of the bounds of the text that forms the current selection.

param1
     ULONG  ulReserved  /*  Reserved value, should be 0. */

param2
     ULONG  ulReserved  /*  Reserved value, should be 0. */

returns
     SHORT  sMinSel     /*  Offset of the first character in the selection. */
     SHORT  sMaxSel     /*  Offset of the first character after the selection. */