Addicon problem

[MrNoob]

I got problem with this function for adding icon to a program with small programs it corupts it and with bigger programs it doesn't even do anything

#include <stdio.h>
#include <windows.h>
#define MIN 2
char *ReadFile(char *SzFile,int *BytesCount) {
    int fSize;
    FILE *pFile;
    char *Buffer;
    if(!(pFile=fopen(SzFile,"rb")))
        return NULL;
    fseek(pFile,0,SEEK_END);
    fSize=ftell(pFile);
    rewind(pFile);
    if(!(Buffer=(char*)calloc(fSize,sizeof(char))))
        return NULL;
    fread(Buffer,fSize,1,pFile);
    *BytesCount=fSize;
    return Buffer;
}
bool AddIcon(char *SzFile,char *SzIcon) {
    HANDLE ih;
    char *Buffer;
    int fSize=0;
    if(!(Buffer=ReadFile(SzIcon,&fSize)) || !(ih=BeginUpdateResource(SzFile,FALSE)) \
       || !UpdateResource(ih,MAKEINTRESOURCE(3),MAKEINTRESOURCE(50),0,Buffer+22,fSize-22) \
       || !EndUpdateResource(ih,FALSE)
      ){
            Buffer ? free(Buffer) , ih ? CloseHandle(ih) : 0 : 0;
            return false;
       }
    free(Buffer),CloseHandle(ih);
    return true;
}
int main(int argc,char *argv[])
{
    if(argc<MIN) {
        printf("wrong usage: must be bigger than %d\n",MIN);
        return 1;
    }
    int sucess=0;
    for(int i=1;i<argc;i++)
        if(AddIcon(argv[i],argv[argc-1])) {
            printf("\nadded icon %s to file %s\n",argv[argc-1],argv[i]);
            sucess++;
        }
    printf("we succesfully added %d icons",sucess);
    return 0;
}

I searched all the net i couldn't find what's the problem this is
hopefully someone will help me what's wrong