GMVER (10-digit signed integer)

Structure version number.

The value must be one of the following:

GMVER1

Version-1 get-message options structure.

GMVER2

Version-2 get-message options structure.

GMVER3

Version-3 get-message options structure.

Fields that exist only in the more-recent versions of the structure are identified as such in the descriptions of the fields. The following constant specifies the version number of the current version:

GMVERC

Current version of get-message options structure.

This is always an input field. The initial value of this field is GMVER1.