Hello Jan!
If I understand your problem, you are trying to get the System VIO font in
an MLE.  I have done this before, but not using WinSetPresParam -- I used
WinSendMsg.  With WinSendMsg you just set up a FATTRS variable with the
correct font; just for fun here it is:
 
hps = WinBeginPaint (hwndFrame, NULLHANDLE, NULL);
cMonoFonts = GpiQueryFonts  (hps,
                             QF_PUBLIC,
                             "System VIO",
                             &cFonts,
                             0L,
                             (PFONTMETRICS) NULL);
pfm = malloc (cMonoFonts*sizeof(FONTMETRICS));
GpiQueryFonts (hps, QF_PUBLIC, "System VIO",
                        &cMonoFonts, sizeof (FONTMETRICS), pfm);
iFontsize=0;
while (pfm[iFontsize].sNominalPointSize < POINTSIZE) iFontsize++;
fat.usRecordLength = sizeof (fat);
fat.fsSelection = 0L;
fat.lMatch = pfm[iFontsize].lMatch;
iCharheight = pfm[iFontsize].lMaxBaselineExt;
iCharwidth = pfm[iFontsize].lAveCharWidth;
strcpy (fat.szFacename, "System VIO");
free (pfm);
 
(Please forgive the sloppy formatting...)  The variable types should be
pretty obvious here, so I didn't include them; the only gotcha is that
POINTSIZE is not 14 (in my case) but 140 for a 14-point font, I guess
because some fonts can be sized in tenths of a point.  Then when you want
to set your MLE to use the System VIO font you just use
   WinSendMsg (hwndMLE, MLM_SETFONT, (MPARAM) &fat, (MPARAM) 0);
and it should work.  Actually I have found that if I do this when I create
the MLE it "forgets" what font it should be, and I have to set it
again later -- I haven't bothered to figure out why.  Anyway this may help
you a little, I hope.
Richard Price

--- Maximus/2 2.02