C++ update registry keys

i need from my program to change some registry values. not create new, only update. i've read something about TRegistry but its working only in C++ Builder, and i have Code::Blocks IDE with Digital Mars compiller. so i need some good function that will do this. google returned only threads about TRegistry, but i cant use this. if anyone knows, please help me.

btw… my 200th post ;)

ok, i solved it, for i have this source for example

// Registry.cpp : main project file.

#include "stdafx.h"

using namespace System;
using namespace System::Diagnostics;
using namespace Microsoft::Win32;

void WriteRegistry(RegistryKey __gc* ParentKey , String __gc* SubKey , String __gc* ValueName , Object *Value )
{
	RegistryKey __gc* Key;
    try
	{
		//Open the registry key.
		Key = ParentKey->OpenSubKey(SubKey,true);
		if (!Key) //if the key does not exist.
		{
            //Create the Subkey
			Key = ParentKey->CreateSubKey(SubKey);
		}
        
		//Set the value.
		Key->SetValue(ValueName, Value);

		Console::WriteLine(S"Value:{0} for {1} is successfully written.", Value, ValueName);
	}
	catch (Exception *e)
	{
		Console::WriteLine(S"Error occurs in WriteRegistry", e->Message); 
	}
}

void ReadRegistry( RegistryKey __gc* ParentKey , String __gc* SubKey, String __gc* ValueName , Object *Value)
{
    RegistryKey __gc* Key;
    try
	{
        //Open the registry key.
        Key = ParentKey->OpenSubKey(SubKey, true);

        if (!Key)	//if the key does not exist
		{
            throw new Exception(S"The registry key does not exist");
		}

        //Get the value.
		Value = Key->GetValue(ValueName);

		Console::Write(S"Value:{0} for {1} is successfully retrieved.", Value, ValueName);
	}
	catch( Exception *e)
	{
		Console::Write(S"Error occurs in ReadRegistry", e->Message );
	}
}

int main()
{
	Int32 i = 123;
	System::Object* obj = __box(i);
	Console::Write(S"\tWelcome....\n");
	Console::Write(S"\tblahblahblah\n");
	
	WriteRegistry(Registry::CurrentUser, S"Software\\test", S"Count", obj);

    Object * Value;
	ReadRegistry(Registry::CurrentUser, S"Software\\test", S"Count", Value);

	Console::ReadLine();
}

compiled with c++ visual studio 2005 express… but if you look carefully at the source, you see that i have the int32, declared for now as 123, which will in registry appear as REG_DWORD. but i need to change it to REG_BINARY, because i need to enter some data like: ""DigitalProductId"=hex:a4,00,00,00,03,00……." so its in hex and i cant use REG_DWORD and Int32 for this. so if someone can help me with this, thanks.