Help in LCD program delay function

Warning [359] C:\Users\WhyWhy\Desktop\Interfacing LCD with PIC Microcontroller - Hi Tech C\8 Bit\code.c; 30.48 illegal conversion between pointer types
Executing: "C:\Program Files (x86)\HI-TECH Software\PICC\9.70\bin\picc.exe" "-olcd pic.cof" "-mlcd pic.map" --summary=default --output=default code.p1 --chip=16F877A -P --runtime=default --opt=default -D__DEBUG=1 -g --asmlist "--errformat=Error   [%n] %f; %l.%c %s" "--msgformat=Advisory[%n] %s" "--warnformat=Warning [%n] %f; %l.%c %s" 
(1273) Omniscient Code Generation not available in Lite mode (warning)
HI-TECH C Compiler for PIC10/12/16 MCUs (Lite Mode)  V9.70
Copyright (C) 2009 Microchip Technology Inc.
Warning [1355] C:\Users\WhyWhy\Desktop\Interfacing LCD with PIC Microcontroller - Hi Tech C\8 Bit\code.c; 33. inline delay argument too large
Warning [1355] C:\Users\WhyWhy\Desktop\Interfacing LCD with PIC Microcontroller - Hi Tech C\8 Bit\code.c; 39. inline delay argument too large
Warning [1355] C:\Users\WhyWhy\Desktop\Interfacing LCD with PIC Microcontroller - Hi Tech C\8 Bit\code.c; 46. inline delay argument too large
Error   [800] lcd pic.as; 998. undefined symbol "__delay"

#include<htc.h>
#include<pic.h>

#define RS RB6
#define EN RB7
#define D0 RC0
#define D1 RC1
#define D2 RC2
#define D3 RC3
#define D4 RC4
#define D5 RC5
#define D6 RC6
#define D7 RC7


#define _XTAL_FREQ 8000000
#include "lcd.h"



void main()
{
 int i;
  TRISB = 0x00;
  TRISC = 0x00;
  Lcd4_Init();
  while(1)
  {
    Lcd4_Set_Cursor(1,1);
    Lcd4_Write_String("LCD Hello World");
    for(i=0;i<15;i++)
    {
      __delay_ms(1000);
      Lcd4_Shift_Left();
    }
    for(i=0;i<15;i++)
    {
      __delay_ms(1000);
      Lcd4_Shift_Right();
    }
    Lcd4_Clear();
    Lcd4_Set_Cursor(2,1);
    Lcd4_Write_Char('e');
    Lcd4_Write_Char('S');
    __delay_ms(2000);
  }
}

//LCD Functions
#include <htc.h>
#ifndef D0
#define D0 RB0
#define D1 RB1
#define D2 RB2
#define D3 RB3
#endif


//LCD 8 Bit Interfacing Functions
void Lcd8_Port(char a)
{
	if(a & 1)
		D0 = 1;
	else 
		D0 = 0;
	
	if(a & 2)
		D1 = 1;
	else
		D1 = 0;
	
	if(a & 4)
		D2 = 1;
	else
		D2 = 0;
	
	if(a & 8)
		D3 = 1;
	else
		D3 = 0;
	
	if(a & 16)
		D4 = 1;
	else
		D4 = 0;

	if(a & 32)
		D5 = 1;
	else
		D5 = 0;
	
	if(a & 64)
		D6 = 1;
	else 
		D6 = 0;
	
	if(a & 128)
		D7 = 1;
	else
		D7 = 0;
}
void Lcd8_Cmd(char a)
{ 
  RS = 0;             // => RS = 0
  Lcd8_Port(a);             //Data transfer
  EN  = 1;             // => E = 1
  __delay_ms(5);
  EN  = 0;             // => E = 0
}

Lcd8_Clear()
{
	  Lcd8_Cmd(1);
}

void Lcd8_Set_Cursor(char a, char b)
{
	if(a == 1)
	  Lcd8_Cmd(0x80 + b);
	else if(a == 2)
		Lcd8_Cmd(0xC0 + b);
}

void Lcd8_Init()
{
	Lcd8_Port(0x00);
	RS = 0;
	__delay_ms(25);
	///////////// Reset process from datasheet /////////
  Lcd8_Cmd(0x30);
__delay_ms(5);
  Lcd8_Cmd(0x30);
	__delay_ms(15);
  Lcd8_Cmd(0x30);
  /////////////////////////////////////////////////////
  Lcd8_Cmd(0x38);    //function set
  Lcd8_Cmd(0x0C);    //display on,cursor off,blink off
  Lcd8_Cmd(0x01);    //clear display
  Lcd8_Cmd(0x06);    //entry mode, set increment
}

void Lcd8_Write_Char(char a)
{
   RS = 1;             // => RS = 1
   Lcd8_Port(a);             //Data transfer
   EN  = 1;             // => E = 1
  __delay_ms(4);
   EN  = 0;             // => E = 04
}

void Lcd8_Write_String(char *a)
{
	int i;
	for(i=0;a[i]!='\0';i++)
	 Lcd8_Write_Char(a[i]);
}

void Lcd8_Shift_Right()
{
	Lcd8_Cmd(0x1C);
}

void Lcd8_Shift_Left()
{
	Lcd8_Cmd(0x18);
}
//End LCD 8 Bit Interfacing Functions

//LCD 4 Bit Interfacing Functions

void Lcd4_Port(char a)
{
	if(a & 1)
		D4 = 1;
	else 
		D4 = 0;
	
	if(a & 2)
		D5 = 1;
	else
		D5 = 0;
	
	if(a & 4)
		D6 = 1;
	else
		D6 = 0;
	
	if(a & 8)
		D7 = 1;
	else
		D7 = 0;
}
void Lcd4_Cmd(char a)
{ 
	RS = 0;             // => RS = 0
	Lcd4_Port(a);
	EN  = 1;             // => E = 1
  __delay_ms(4);
  EN  = 0;             // => E = 0
}

Lcd4_Clear()
{
	Lcd4_Cmd(0);
	Lcd4_Cmd(1);
}

void Lcd4_Set_Cursor(char a, char b)
{
	char temp,z,y;
	if(a == 1)
	{
	  temp = 0x80 + b;
		z = temp>>4;
		y = (0x80+b) & 0x0F;
		Lcd4_Cmd(z);
		Lcd4_Cmd(y);
	}
	else if(a == 2)
	{
		temp = 0xC0 + b;
		z = temp>>4;
		y = (0xC0+b) & 0x0F;
		Lcd4_Cmd(z);
		Lcd4_Cmd(y);
	}
}

void Lcd4_Init()
{
Lcd4_Port(0x00);
   __delay_ms(20);
  Lcd4_Cmd(0x03);
	__delay_ms(5);
  Lcd4_Cmd(0x03);
	__delay_ms(11);
  Lcd4_Cmd(0x03);
  /////////////////////////////////////////////////////
  Lcd4_Cmd(0x02);    
	Lcd4_Cmd(0x02);
  Lcd4_Cmd(0x08); 	
	Lcd4_Cmd(0x00); 
	Lcd4_Cmd(0x0C);     
  Lcd4_Cmd(0x00);    
  Lcd4_Cmd(0x06);   
}

void Lcd4_Write_Char(char a)
{
   char temp,y;
   temp = a&0x0F; 
   y = a&0xF0;	
	 RS = 1;             // => RS = 1
   Lcd4_Port(y>>4);             //Data transfer
	 EN = 1;
	 __delay_ms(5);
	 EN = 0;
	 Lcd4_Port(temp);
	 EN = 1;
	 __delay_ms(5);
	 EN = 0;
}

void Lcd4_Write_String(char *a)
{
	int i;
	for(i=0;a[i]!='\0';i++)
	 Lcd4_Write_Char(a[i]);
}

void Lcd4_Shift_Right()
{
	Lcd4_Cmd(0x01);
	Lcd4_Cmd(0x0C);
}

void Lcd4_Shift_Left()
{
	Lcd4_Cmd(0x01);
	Lcd4_Cmd(0x08);
}
//End LCD 4 Bit Interfacing Functions

Error   [800] lcd pic.as; 998. undefined symbol "__delay"