INFO: Windows Metafile funções & Aldus metaficheiros posicionável

   typedef struct
     {
     DWORD   key;
     HANDLE  hmf;
     RECT    bbox;
     WORD    inch;
     DWORD   reserved;
     WORD    checksum;
     } APMFILEHEADER;
				

   BOOL RenderAPM (fh)
   int   fh; // a file handle to the APM metafile is passed in
   {
       HANDLE           hData;
       LPSTR            lpData;
       DWORD            OffsetToMeta;
       METAHEADER       mfHeader;
       APMFILEHEADER    APMHeader;

       OffsetToMeta = sizeof(APMHeader);

   // Seek to beginning of file and read APM header
       _llseek(fh, 0, 0);
       if (!_lread(fh, (LPSTR)&APMHeader, sizeof(APMFILEHEADER)))
           // Error in reading the file
           return(FALSE);

   // Return to read metafile header
       _llseek(fh, OffsetToMeta, 0);
       if (!_lread(fh, (LPSTR)&mfHeader, sizeof(METAHEADER)))
           // Error in reading
           return(FALSE);

   // Allocate memory for memory based metafile
       if (!(hData = GlobalAlloc(GHND, (mfHeader.mtSize * 2L))))
           return(FALSE);
   // Were we successful?
       if (!(lpData = GlobalLock(hData)))
       {
           // Error in allocation
           GlobalFree(hData);
           return(FALSE);
       }

   // Read metafile bits
       _llseek(fh, OffsetToMeta, 0);
       if (!_lread(fh, lpData, (mfHeader.mtSize * 2L)))
       {
           // Error in reading
           GlobalUnlock(hData);
           GlobalFree(hData);
           return(FALSE);
       }

   // Create the METAFILE with the bits we read in.
       if (!(hMF = SetMetaFileBits(hData)))
           return(FALSE);

       GlobalUnlock(hData);

   // Close the APM file
       _lclose(fh);

   // Return success
       return(TRUE);
   }