You're reading the documentation for an older, but still supported version (GL013300).
For information on the latest version, please have a look at GL013301.

MESSAGE_PROGRESS

This is a structure information to provide information on the current progress when the robot controller executes the DRL program, and consists of the following fields.

BYTE#	Field Name	Data Type	Value	Remarks
0	_iCurrentCount	unsigned char		Current progress step(progress information)
1	_iTotalCount	unsigned char		Total progress step count(progress information)

Total size: 2 bytes

Defined in: DRFS.h

typedef struct _MESSAGE_PROGRESS
{
    unsigned char _iCurrentCount;  /* current step */
    unsigned char _iTotalCount;    /* total step */
} MESSAGE_PROGRESS, *LPMESSAGE_PROGRESS;