[anh_gioi]

bài này:

/*-----------------------------------------------------------------------------
* Author     : nhh
* Date       : 05/04/06
* Hardware   : PIC16F877A
* Compiler     : CCS C 3.249
* Description   : Hien thi LCD
*=============================================================================*/
#include <16F877A.h>
//#include <DEFS_16F877A.h>
#fuses XT,NOWDT,NOPROTECT,NOLVP
#use delay(clock=4000000)
#define RS  RD0
#define RW  RD1
#define E   RD2
#define LCD PORTB

/*Ham yeu cau goi lenh dieu khien LCD*/
void comnwrt(void)
{
 RS = 0;
 RW = 0;
 E  = 1;
 E  = 0;
 delay_ms(1);
}
/*Ham yeu cau goi du lieu hien thi len LCD*/
void datawrt(void)
{
 RS = 1;
 RW = 0;
 E  = 1;
 E  = 0;
 delay_ms(1);
}
/*Ham main*/
void main(void)
{
 set_tris_B(0);
 set_tris_D(0);
 delay_ms(100);   //   Tao tre 100ms cho LCD khoi dong

 LCD = 0x38;      //   Hai hang, ma tran dot 5*7, 8 bit interface
 comnwrt();
 LCD = 0x0C;      //   Bat hien thi, tat con tro
 comnwrt();

 LCD = 0x85;      //   Vi tri hang 1,cot 6
 comnwrt();

 LCD = 'B';       //   Xuat dong chu "BE YEU" ra LCD
 datawrt();
 LCD = 'E';
 datawrt();
 LCD = ' ';
 datawrt();
 LCD = 'Y';
 datawrt();
 LCD = 'E';
 datawrt();
 LCD = 'U';
 datawrt();
 LCD = '!';
 datawrt();
}

bài này không bít gọi file DEFS_16F877A.h ra như thế nào nhỉ?
mong mọi người chỉ dùm.thank!