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DMXQueryVersion(3X)                                                                      DMXQueryVersion(3X)



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(3X), DMX(3X), Xdmx(1)



X Version 11                                    libdmx 1.0.2                             DMXQueryVersion(3X)