XmRegisterSegmentEncoding registers a compound text encoding format
with the specified font list element tag. The XmCvtXmStringToCT
function uses this registry to map the font list tags of compound string
segments to compound text encoding formats. Registering
a font list tag that already exists in the registry overwrites the original
entry. You can unregister a font list tag by passing a NULL value for the
ct_encoding parameter.
fontlist_tag
Specifies the font list element tag to be registered. The
tag must be a NULL-terminated ISO8859-1 string.
ct_encoding
Specifies the compound text character set to be used for segments
with the font list tag. The value must be a NULL-terminated ISO8859-1 string.
A value of XmFONTLIST_DEFAULT_TAG maps the specified font list tag to
the code set of the locale.
Return value
Returns NULL for a new font list tag or the old ct_encoding
value for an already registered font list tag. The
application is responsible for freeing the
storage associated with the returned data (if any) by
calling XtFree.