Dingoonity.org

unsigned long StrToHex(char* str)
{
 unsigned long hex,val;
 int n;

 hex=0;
 for(n=0;n<strlen(str);n++) {
  if(str[n]>='0' && str[n]<='9')
   val=(unsigned long)(str[n]-'0');
  else if(str[n]>='a' && str[n]<='f')
   val=((unsigned long)(str[n]-'a'))+0xA;
  else if(str[n]>='A' && str[n]<='F')
   val=((unsigned long)(str[n]-'A'))+0xA;
  else
   val=0;
  hex<<=4;
  hex|=val;
 }
 return hex;
}