ActiveQt uses only the optional parameter count to determine optional parameters, and disregards the PARAMFLAG_FOPT flag

This leads to problems with inconsistent type libraries, where not enough overloads are generated.

A patch against Qt 3.3 (qaxbase.cpp) is

@@ -1884,7 +1884,7 @@
prototype += ptype.mid( 6 );
else
prototype += constRefify( ptype );

• if ( optional || pdesc.wParamFlags&PARAMFLAG_FHASDEFAULT)
  + if ( optional || pdesc.wParamFlags&(PARAMFLAG_FHASDEFAULT | PARAMFLAG_FOPT))
  ptype += "=0";
  paramTypes << ptype;
  parameters << paramName;

And in Qt 4:

@@ -2324,7 +2324,7 @@
prototype += ptype;
if (pdesc.wParamFlags & PARAMFLAG_FOUT && !ptype.endsWith("&") && !ptype.endsWith("**")
)
prototype += "&";

• if (optional)
  + if (optional || pdesc.wParamFlags & PARAMFLAG_FOPT)
  paramName += "=0";
  else if (pdesc.wParamFlags & PARAMFLAG_FHASDEFAULT) {
  // ### get the value from pdesc.pparamdescex