Binary I/O functions in C, to read mp3 id3

#include <stdio.h> 
#include <stdlib.h> 

typedef struct _id3tag
{
	char title[30]; 
	char artist[30]; 
	char album[30]; 
	char year[4]; 
	char comment[30];
	unsigned char track; 
	unsigned char genre; 
} id3tag; 

int ReadID3(const char* Filename, id3tag *ID3Tag); //0==error, 1==sucess 

int main(int argc, char **argv)
{
	id3tag ID3; 
	if(!ReadID3("C:\\g.mp3",&ID3))
		printf("error!\n"); 
	
	printf("Genre %d\nYear %s\n",ID3.genre,ID3.year); 
	return 0; 
}


int ReadID3(const char* Filename, id3tag *ID3Tag)
{
	FILE *fp=fopen(Filename,"rb"); 
	char buffer[128]; 
	int x; 

	fseek(fp,-128,SEEK_END); 
	fread(buffer,sizeof(char),sizeof(buffer),fp); 

	if(!(buffer[0]=='T' && buffer[1] == 'A' && buffer[2] == 'G'))
	{
		return 0; 
	}
	
	//Found id3 tag, let's fill out our id3tag struct 
	for(x=0;x<30;x++)
		ID3Tag->title[x] = buffer[x+3]; //take 3 off cause of TAG 
		ID3Tag->title[30] = '\0'; 

	for(x=0;x<30;x++)
		ID3Tag->artist[x] = buffer[x+33]; //33 = TAG + title 
		ID3Tag->artist[30] = '\0'; 

	for(x=0;x<30;x++)
		ID3Tag->album[x] = buffer[x+63]; //TAG + title + artist 
		ID3Tag->album[30] = '\0'; 

	for(x=0;x<4;x++)
		ID3Tag->year[x] = buffer[x+93]; //TAG + title + artist + album 
		ID3Tag->year[4] = '\0'; 
		
	for(x=0;x<30;x++)
		ID3Tag->comment[x] = buffer[x+97]; //TAG + title + artist + album + year 
		ID3Tag->comment[30] = '\0'; 

	if(buffer[127] > 0 && buffer[127] < 256)
		ID3Tag->genre = buffer[127]; //If its between 1-255, put it 
	else 
		ID3Tag->genre = 255; //255 means unused 

	//ID3 1.1 compatibility (Track field) 
	if(ID3Tag->comment[28] == '\0')
		ID3Tag->track = ID3Tag->comment[29]; //If comment ends at 28.. then 29 is the track 
	else
		ID3Tag->track = 0; //0 mean's unknown track 
	return 1; 
}

	FILE *fp=fopen("C:\\whatever.mp3","rb"); 
	fseek(fp,-128,SEEK_END); 
	fclose(fp);