problem with raw html in tex4ht with httex

[Patrice Dumas]

Hello,

This may be related to the issue about tex4ht giving bad result with
httex (or httexi).  I also have problem with outputting raw html.  In 
plain tex I use

\ifx \HCode \undefined
\else
\HCode{\Hnewline <!-- tex4ht_begin tex_tex4ht_tex tex 1 -->}
\fi

but I get ! Undefined control sequence. for \Hnewline, and when I 
remove \Hnewline another error for _ not in mathmode, and when I replace 
_ with - what is in \HCode{} is processed as TeX and not output as is.

If I test with some equivalent latex code

\ifdefined\HCode
\HCode{\Hnewline <!-- tex4ht_begin tex_tex4ht_tex tex 1 -->}
\fi

it works well.

I attach the file I use to test httex and the equivalent file with
htlatex.

I guess that all that should be reported to tex4ht. 

-- 
Pat

bug_httex.tex
Description: Text Data

bug_httex_equiv_latex.tex
Description: Text Data