NAME

       DMXQueryVersion - determine DMX extension version

SYNOPSIS

       #include <X11/extensions/dmxext.h>

       Bool DMXQueryVersion(Display *dpy,
                            int *major_version,
                            int *minor_version,
                            int *patch_version);

DESCRIPTION

       DMXQueryVersion() returns version information about the DMX protocol extension.

       Any  incompatible changes to the protocol will be indicated by a change in major_version.  Small, upward-
       compatible changes will be indicated by a change in minor_version.   In  general,  patch_version  is  for
       informational purposes and will encode the date of the last protocol revision (e.g., 20040604).

RETURN VALUE

       If  the DMX protocol extension is available, major_version, minor_version, and patch_version will be set,
       and True will be returned.  Otherwise, False will be returned.

NOTES

       At the time of this writing, the DMX protocol is at version 2.2.

       Version 2.2 was the final development version, and code supporting this version was submitted to upstream
       X server repositories in the summer of 2004.

       Version  1.5  was  the  last  of  the  1.x series, which was used for development before screen and input
       addition and removal were supported.  Version 2.0  and  2.1  were  development  versions  that  partially
       supported screen and input addition and removal.

       Since  we  do not expect development versions to be widely used, we recommend that any software that uses
       the DMX protocol extension to support only versions 2.2 and above (although they  should  detect  earlier
       versions and either reduce functionality or fail gracefully).

SEE ALSO

       DMXQueryExtension(3), DMX(3), Xdmx(1)