RgBGIdrv.PAS
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 { Example for RegisterBGIDriver function.}

  uses Graph;
 var
   Driver, Mode: Integer;
   DriverF: file;
   DriverP: pointer;
 begin
   { Open driver file, read, register }
   Assign(DriverF, 'CGA.BGI');
   Reset(DriverF, 1);
   GetMem(DriverP, FileSize(DriverF));
   BlockRead(DriverF, DriverP^,
             FileSIze(DriverF));
   if RegisterBGIdriver(DriverP) < 0 then
   begin
     WriteLn('Error registering driver: ',
             GraphErrorMsg(GraphResult));
     Halt(1);
   end;
   { Init graphics }
   Driver := CGA;
   Mode := CGAHi;
   InitGraph(Driver, Mode, '');
   if GraphResult < 0 then
     Halt(1);
   OutText('Driver loaded by user program');
   ReadLn;
   CloseGraph;
 end.