read binary file

I read the binary code of an file with _open(). The data read to the buffer with _read(). I need to translate this constant char[] to hex value, what function can I use??
eg: data in buffer buff[0]= ef, buff[1]=01

what I need is at the end I can get a long value 0xef01, how to make it??

Or there is other function to read binary file where the output is store in integer value? I am using visual studio C++ 6.0. Thanks.

You've already got binary information, just not in hex format.

Let's say you read in a buffer (buf) of 512 bytes, using a pretend function called readmyfile(I'm not writing a binary read function here, merely showing hex conversion):

Use the HexFromBin function

Code:

---

// prototype so you know what the call looks like
void HexFromBin(
  LPBYTE pb, 
  int cb,     
  LPTSTR sz   
);
main(){
  char buf[513];
  readmyfile(buf);
  LPSTR myHexString;

  HexFromBin((LPBYTE) buf, 512, myHexString);
  printf("%s\n",myHexString);
}

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