Could you please explain better the function you are talking about? I don't quite understand how to get there. I'm having the same issue, I need to find out the length of a line. I was told that exporting the illustrator file to autocad, would do the trick, but I'm having problems doing it from CS3. If tehre is a way to find the lenght in Illustrator, it would be great!
Thanks,

I use the routine below in my tool JLG.Dimension (http://perso.orange.fr/jlg.outils) to calculate the length of a Bezier curve.<br />This is my little contribution to this discussion. To obtain the length as a string, you have to use a routine to convert a AIReal number into a string.<br />I hope this will help somebody.<br /><br />extern void BezierLength(AIArtHandle *path, short unit, AIReal scale, char BezierlengthText[])<br />     {//Calculate in BezierlengthText the total length of the Bezier curve (path). The result is a string.<br />     //If unit is 0 the length will be mm, 1 cm, 2 inches, 3 points, 4 picas and 5 for meters. <br />     AIErr error=kNoErr;<br />     long i, j;<br />     short pathCount, NtS;//NtS for number to string.<br />     AIBoolean IsClosed;<br />     AIRealBezier PtBezier;<br />     AIPathSegment Pt1, Pt2;<br />     //At the beginning, the length is zero.<br />     AIReal LengthOfBezier=0.0;<br />     <br /><br />     error = sPath->GetPathSegmentCount(*path, &pathCount );<br />     //If the path analyzed is closed, it will be necessary to add the length of the last part of the Bezier curve. <br />     error=sPath->GetPathClosed(*path, &IsClosed);<br /><br />     for(j=0;j<pathCount-1;j++)<br />          {//One point and the next point.<br />          error = sPath->GetPathSegments( *path, j, 1, &Pt1);<br />          error = sPath->GetPathSegments( *path, j+1, 1, &Pt2);<br /><br />          PtBezier.p0.h=Pt1.p.h;<br />          PtBezier.p0.v=Pt1.p.v;<br /> <br />          PtBezier.p1.h=Pt1.out.h;<br />          PtBezier.p1.v=Pt1.out.v;<br /><br />          PtBezier.p2.h=Pt2.in.h;<br />          PtBezier.p2.v=Pt2.in.v;<br /><br />          PtBezier.p3.h=Pt2.p.h;<br />          PtBezier.p3.v=Pt2.p.v;<br /><br />          LengthOfBezier+=sBezier->Length(&PtBezier, 1.0);<br />          }<br /><br />     if(IsClosed)<br />          {//The path is closed, we must calculate the length of the last segment (point 0 and point pathCount-1).<br />          error = sPath->GetPathSegments( *path, 0, 1, &Pt1);<br />          error = sPath->GetPathSegments( *path, pathCount-1, 1, &Pt2);<br /><br />          PtBezier.p0.h=Pt1.p.h;<br />          PtBezier.p0.v=Pt1.p.v;<br /><br />          PtBezier.p1.h=Pt1.in.h;<br />          PtBezier.p1.v=Pt1.in.v;<br /><br />          PtBezier.p2.h=Pt2.out.h;<br />          PtBezier.p2.v=Pt2.out.v;<br /><br />          PtBezier.p3.h=Pt2.p.h;<br />          PtBezier.p3.v=Pt2.p.v; <br />          LengthOfBezier+=sBezier->Length(&PtBezier, 1.0);<br />          }<br /><br />     //At this moment, LengthOfBezier contains the total length of the curve but the unit used is the point.<br />     switch(unit)<br />          {case 0://millimeters.<br />               LengthOfBezier=LengthOfBezier* 25.4 / 72.0 / scale;<br />               //Transform the length into a string.<br />               NtS=NumberToString(LengthOfBezier, BezierlengthText);<br />               //Add the unit.<br />               std::strcat(BezierlengthText, " mm");<br />          break;<br />          case 1://centimeters.<br />               LengthOfBezier=LengthOfBezier* 2.54 / 72.0/ scale;<br />               //Transform the length into a string.<br />               NtS=NumberToString(LengthOfBezier, BezierlengthText);<br />               //Add the unit.<br />               std::strcat(BezierlengthText, " cm");<br />          break;<br />          case 2://Inches.<br />               LengthOfBezier=LengthOfBezier/ 72.0 / scale;<br />               //Transform the length into a string.<br />               NtS=NumberToString(LengthOfBezier, BezierlengthText);<br />               //Add the unit.<br />               std::strcat(BezierlengthText, " in");<br />          break;<br />          case 3://Points.<br />               LengthOfBezier=LengthOfBezier/ scale;<br />               //Transform the length into a string.<br />               NtS=NumberToString(LengthOfBezier, BezierlengthText);<br />               //Add the unit.<br />               std::strcat(BezierlengthText, " pt");<br />          break;<br />          case 4://Picas.<br />               LengthOfBezier=LengthOfBezier/ 12.0/ scale;<br />               //Transform the length into a string.<br />               NtS=NumberToString(LengthOfBezier, BezierlengthText);<br />               //Add the unit.<br />               std::strcat(BezierlengthText, " pi");<br />          break;<br />          case 5://Meters.<br />               LengthOfBezier=LengthOfBezier * 0.0254 / 72.0 / scale;<br />               //Transform the length into a string.<br />               NtS=NumberToString(LengthOfBezier, BezierlengthText);<br />               //Add the unit.<br />               std::strcat(BezierlengthText, " m");<br />          break;<br />          default:<br />          break;<br />          }<br />     }<br /><br />JLG.