Here's how I'd create a MD5 hash...

Not that anyone cares, but here's how I'd create a MD5 hash:

#include <windows.h>
#include <wincrypt.h>
#define StrLen wcslen

typedef unsigned char uchar ;
typedef unsigned long ulong ; typedef unsigned __int64 u64 ;
typedef uchar * _LnP ; typedef wchar_t * LnP ;

const int SzChar = sizeof ( wchar_t );

   #pragma warning( disable: 4430 4508 )
   u64 Hash[ 2 ];
HashIt( LnP B ) { HCRYPTPROV hProv ; HCRYPTHASH hHash ;

    CryptAcquireContext(
      & hProv, 0, 0, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT );
    CryptCreateHash( hProv, CALG_MD5, 0, 0, & hHash );
    CryptHashData( hHash, _LnP( B ), StrLen( B ) * SzChar, 0 );

    ulong SzHash = sizeof Hash ; // In and out
    CryptGetHashParam( hHash, HP_HASHVAL, _LnP( Hash ), & SzHash, 0 );
    CryptDestroyHash( hHash ); CryptReleaseContext( hProv, 0 ); }

int __stdcall WinMain( HINSTANCE, HINSTANCE, char*, int ) {
  HashIt( L"Hello World" );

  // Breaking here, ??? * Hash == 0xec085830543af7e9 ???.
  HashIt( L"X" );

  // Here ??? * Hash == 0xedfa68d340749cd5 ???.
  HashIt( L"Hello World" );

  // Here, again, ??? * Hash == 0xec085830543af7e9 ???.
}