bmp картинки

[B@R@B@$HK@]

как мне вывести на екран картинку bmp формата припустим с именем new.bmp

Вот нашел код ток я сам в нем не розберусь!!!
Напишите хоть коменты к нему плс:

#include <alloc.h>
#include <conio.h>
#include <graphics.h>
#include <stdio.h>
#include <stdlib.h>

struct BMP
{
char Type[2]; //File type. Set to "BM".
unsigned long Size; //Size in BYTES of the file.
unsigned long Reserved; //Reserved. Set to zero.
unsigned long OffSet; //Offset to the data.
unsigned long headsize; //Size of rest of header. Set to 40.
unsigned long Width; //Width of bitmap in pixels.
unsigned long Height; // Height of bitmap in pixels.
unsigned int Planes; //Number of Planes. Set to 1.
unsigned int BitsPerPixel; //Number of Bits per pixels.
unsigned long Compression; //Compression. Usually set to 0.
unsigned long SizeImage; //Size in bytes of the bitmap.
unsigned long XPixelsPreMeter; //Horizontal pixels per meter.
unsigned long YPixelsPreMeter; //Vertical pixels per meter.
unsigned long ColorsUsed; //Number of colors used.
unsigned long ColorsImportant; //Number of "important" colors.
};

int ShowBMP(int x, int y, char* FileName)
{
int b,a;
BMP Obj;

unsigned char* Datas;
int in=0;
unsigned char c=0;
FILE * fp;

fp = fopen(FileName,"rb");
if(!fp){
printf("Error : Unable to open file ..");
exit(0);
}

fread(&Obj, sizeof(Obj), 1, fp);
if(Obj.BitsPerPixel!=4) // This isn't a 16 color bmp we can read;
{
fclose(fp);
printf("Error : File format not supported ..");
exit(0);
};
fseek(fp,Obj.OffSet,SEEK_SET);
Datas=(unsigned char*) calloc(Obj.Width/2+1, sizeof(unsigned char));
for(b=Obj.Height;b>=0;b--)
{
fread(Datas, sizeof(unsigned char), Obj.Width/2, fp);
c=0;
in=0;
for(a=0;a<=Obj.Width;a+=2)
{
c = (Datas[in] | 0x00) >>4;
putpixel(a+x,b+y,c);
c = (Datas[in] | 0xF0) & 0x0F;
putpixel(a+1+x,b+y,c);
in++;
}
}
free (Datas);
fclose(fp);
return 1;
}
void main()
{
int color;
int gd , gm ;
gd = VGA ; gm = VGAHI;

initgraph(&gd,&gm,"");
ShowBMP(0,0,"tune.bmp");
getch();
closegraph();
}