除了PDFlib自带字体外，用户还可以使用安装在系统上的字体及其他用户字体。

    PDFlib称安装在Windows和Mac操作系统中的（存在于或被拷入相应系统字体目录的）TrueType, OpenType 和PostScript字体为宿主字体（Host Font）。PDFlib可直接引用字体名进行调用,但必须与文件名完全相同(严格区分大小写)。例如，调用安装在Windows系统中的字体：C:\WINDOWS\Fonts\SimHei.ttf

int Font_CS = 0;
    Font_CS= PDF_load_font(p, "SimHei", 0, "unicode", "");

   除此之外，PDFlib还可以调用其他用户字体。但在调用之时，需要给出路径名。如我想用C:\Program Files\Adobe\Acrobat 7.0\Resource\CIDFont\AdobeSongStd-Light.otf 这个字体：
Font_CS= PDF_load_font(p, "C:\\Program Files\\Adobe\\Acrobat 7.0\\Resource\\CIDFont\\ AdobeSongStd-Light", 0, "unicode", "");

   但这里有个例外，那就是.ttc(TrueType Collection)字体。.ttc是集合字体文件，每个文件中含有多种字体。所以用户不能用文件名调用字体，而是要用真正的字体名。比方说，我们知道C:\WINDOWS\Fonts\MSGOTHIC.TTC 包含三种字体依次名为MS Gothic，MS PGothic，和MS UI Gothic。我们可以用以它们相应的字体名调用：

int Font_E = 0;
    Font_E= PDF_load_font(p, "MS Gothic", 0, "winansi", ""); /* Use MS Gothic */
            PDF_setfont(p, Font_E, 20);
            PDF_show_xy(p, "MS Gothic font:" , 50, 800)；
    Font_E= PDF_load_font(p, "MS PGothic", 0, "winansi", ""); /* Use MS PGothic */
            …….
    Font_E= PDF_load_font(p, "MS UI Gothic", 0, "winansi", ""); /* Use MS UI Gothic */
            ……

    可是我们经常并不清楚.ttc里包含哪些字体。在这种情况PDFlib提供了另一种调用方式—索引（Index）。用此方式，首先须给字体文件名一个别名，然后在别名后加冒号再加数字（0表示文件中第一种字体，1 表示第二种，依次类推。）

int Font_E = 0;
         /* Give “C:\WINDOWS\Fonts\MSGOTHIC.TTC an alias “gothic” */
         PDF_set_parameter(p, "FontOutline", "gothic=C:\\WINDOWS\\Fonts\\MSGOTHIC.TTC");
    Font_E= PDF_load_font(p, "gothic:0", 0, "winansi", ""); /* Use MS Gothic */
    Font_E= PDF_load_font(p, "gothic:1", 0, "winansi", ""); /* Use MS PGothic */
    Font_E= PDF_load_font(p, "gothic:2", 0, "winansi", ""); /* Use MS UI Gothic */


下面是一个相关的例子--C 源程序(附上生成的pdf文件 –PDFlib_cs2.pdf)。

/*******************************************************************/
/* This example demostrates the usage of host font and other fonts
/* based on Chinese Simplifed Windows.
/*******************************************************************/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "pdflib.h"

int main(void)
{
   PDF *p = NULL;
   int i = 0, j = 0, Left = 50, Top = 800;
   int Font_E = 0, Font_CS = 0;
   char fontfile[1024];
   char buf[1024];
   char TextUnicode[] = "\x80\x7B\x53\x4F\x2D\x4E\x87\x65";

    /* create a new PDFlib object */
   if ((p = PDF_new()) == (PDF *) 0)
   {
      printf("Couldn't create PDFlib object (out of memory)!\n");
      return(2);
   }

   PDF_TRY(p) {
   if (PDF_begin_document(p, "pdflib_cs2.pdf", 0, "") == -1)
    {
      printf("Error: %s\n", PDF_get_errmsg(p));
      return(2);
    }

   PDF_set_info(p, "Creator", "pdflib_cs2.c");
   PDF_set_info(p, "Author", "bowriver2001@yahoo.ca");
   PDF_set_info(p, "Title", "Output Chinese Simplify with host font and others");

   /* Start a new page. */
   PDF_begin_page_ext(p, a4_width, a4_height, "");
   Font_E = PDF_load_font(p, "Helvetica-Bold", 0, "winansi", "");

   /* Using host font -- C:\WINDOWS\Fonts\SimHei.ttf. */
   Font_CS= PDF_load_font(p, "SimHei", 0, "unicode", "");
        PDF_setfont(p, Font_E, 20);
        PDF_show_xy(p, "SimHei font:" , Left, Top);
        PDF_setfont(p, Font_CS, 24);
        Top-=30;
        PDF_show_xy(p, TextUnicode , Left, Top);

    /* Using other disk-based font file --
    C:\Program Files\Adobe\Acrobat 7.0\Resource\CIDFont\AdobeSongStd-Light.otf*/
        Top-=50;
         Font_CS= PDF_load_font(p,
   "C:\\Program Files\\Adobe\\Acrobat 7.0\\Resource\\CIDFont\\AdobeSongStd-Light", 0, "unicode", "");
     PDF_setfont(p, Font_E, 20);
     PDF_show_xy(p, "AdobeSongStd-Light font:" , Left, Top);
     PDF_setfont(p, Font_CS, 24);
         Top-=30;
     PDF_show_xy(p, TextUnicode , Left, Top);

   /* Using TrueType collection font with index -- C:\WINDOWS\Fonts\simsun.ttc*/
    Top-=50;
    strcpy(fontfile, "C:\\WINDOWS\\Fonts\\simsun.ttc");
    sprintf(buf, "simsun=%s", fontfile);
   /* Defines AdobeSongStd as alias for ..\AdobeSongStd-Light.otf
   This only need to claim once will be sufficient to configure all fonts in simsun.ttc*/
   PDF_set_parameter(p, "FontOutline", buf);
   /* TTC files contain multiple separate fonts.
       Address 1st font by appending a colon character and 0 after alias simsun */
           Font_CS= PDF_load_font(p, "simsun:0", 0, "unicode", "");
                    PDF_setfont(p, Font_E, 20);
                    PDF_show_xy(p, "simsun:0 font:", Left, Top);
                    PDF_setfont(p, Font_CS, 24);
                        Top-=30;
                    PDF_show_xy2(p, TextUnicode, 8, Left, Top);

  /*Address 2nd font by appending a colon character and 1 after alias simsun */
   Top-=50;
    Font_CS= PDF_load_font(p, "simsun:1", 0, "unicode", "");
             PDF_setfont(p, Font_E, 20);
             PDF_show_xy(p, "simsun:1 font:", Left, Top);
             PDF_setfont(p, Font_CS, 24);
                 Top-=30;
             PDF_show_xy2(p, TextUnicode, 8, Left, Top);

  /* End of page. */
   PDF_end_page_ext(p, "");
   PDF_end_document(p, "");
}

PDF_CATCH(p) {
     printf("PDFlib exception occurred in pdflib_cs2 sample:\n");
     printf("[%d] %s: %s\n",
     PDF_get_errnum(p), PDF_get_apiname(p), PDF_get_errmsg(p));
     PDF_delete(p);
    return(2);
   }

  PDF_delete(p);
return 0;
}