Casio IT-2000W - Manual (Page 238)

238
CloseYMODEM
If this function is called, the use of YMODEM library is completed, and the COM port is closed.
SYNTAX
#include "ymodem.h"
short WINAPI _export CloseYMODEM( void )
INPUT
None
OUTPUT
= 0 Normal termination
= Other Refer to the error code table.