4.3" tft lcd and ft8xx (ft800)

Other Hardware Displays
1 
#include "SPI.h"
#include "Wire.h"
#include "FT_VM800P43_50.h"

sTagXY sTagxy;

FT800IMPL_SPI FTImpl(10, 4, 3);

int16_t BootupConfigure()
{
 uint32_t chipid = 0;
 FTImpl.Init(FT_DISPLAY_WQVGA_480x272);//configure the display to the WQVGA

 delay(20);
 chipid = FTImpl.Read32(FT_ROM_CHIPID);
 
 if(FT800_CHIPID != chipid)
 {
 Serial.print("Error in chip id read ");
 Serial.println(chipid,HEX);
 return 1;
 }
 
 FTImpl.SetDisplayEnablePin(FT_DISPENABLE_PIN);
 FTImpl.DisplayOn();   
 return 0;
}

void Calibrate()
{  
 FTImpl.DLStart();
 FTImpl.ClearColorRGB(102, 179, 26);
 FTImpl.Clear(1,1,1);
 FTImpl.ColorRGB(0xff, 0xff, 0xff);
 FTImpl.Cmd_Text((FT_DISPLAYWIDTH/2), (FT_DISPLAYHEIGHT/2), 27, FT_OPT_CENTER, "Please press in the middle of circles");
 FTImpl.Cmd_Calibrate(0); 
 FTImpl.Finish();
}

void HelloWorld(int tagoption)
{
 const char Display_string[12] = "Hello World";
 
 FTImpl.DLStart();
 FTImpl.ColorRGB(0xFF,0xFF,0xFF);
 FTImpl.Cmd_Text(FT_DISPLAYWIDTH/2, FT_DISPLAYHEIGHT/2, 29, FT_OPT_CENTER, Display_string);
 FTImpl.Tag(12);
 FTImpl.Cmd_Button((FT_DISPLAYWIDTH/4) - (50), (FT_DISPLAYHEIGHT*2/4) - (20), 100, 20, 26, tagoption, "Tag12");
 
 FTImpl.DLEnd();
 FTImpl.Finish();
}


void setup()
{
 Serial.begin(9600);
 

 Serial.println("--Start Application--");
 if(BootupConfigure())
 {
  Calibrate();
 }
   else
 {
 void HelloWorld();
 }
 Serial.println("--End Application--");
}

void loop()
{
  int tagval = sTagxy.tag;

  int tagoption = 0;  
  if(12 == tagval)
  {
    tagoption = FT_OPT_FLAT;
    HelloWorld(tagoption);
  }
  else
  {
    tagoption = 0;
    HelloWorld(tagoption);
  }
}

do anyone have any idea why this program cant be compiled for Arduino Uno/Genuine board?
i'm sure about the libraries I've used
and I can upload them if needed