C#

string strHostName = "";
string strIP;
 
try
{
    strHostName = Dns.GetHostName(); 
    IPAddress [] ips = Dns.Resolve(strHostName).AddressList;
    if(ips.Length >= 1)
        strIP = ips[0].ToString();
    else
        strIP = "(error)";
}
catch
{
    // Error getting the computer name and IP address
    if(strHostName == null || strHostName.Length == 0)
        strHostName = "(error)";
    strIP = "(error)";
}

#pragma once
#include <windows.h>
#undef MessageBox
#using <system.dll>
#using <system.windows.forms.dll>
using namespace System;
using namespace System::Windows::Forms;
using namespace System::Reflection;
using namespace System::Runtime::InteropServices;

#pragma data_seg(".Share")
HHOOK g_Hook = 0;
#pragma data_seg()
#pragma comment(linker, "/section:.Share,rws")

namespace Hooks
{
	int __stdcall KeyboardProc(int code, int wparam, int lparam)
	{
		String^ text = String::Concat("You pressed : ", ((Keys)wparam).ToString());
		MessageBox::Show(text, "Hook Message", MessageBoxButtons::OK);
		return CallNextHookEx(g_Hook, code, wparam, lparam);
		return 0;
	}

	public ref class KeyboardHook
	{
	private:
		KeyboardHook() {};
	public:
		static void SetHook() {
			if (g_Hook != 0)
				return;
			Module^ mod = Assembly::GetExecutingAssembly()->GetModule("Hooks.dll");
			IntPtr hinst = Marshal::GetHINSTANCE(mod);
			g_Hook = SetWindowsHookEx(WH_KEYBOARD, reinterpret_cast<HOOKPROC>(KeyboardProc), static_cast<HINSTANCE>(hinst.ToPointer()), 0);
		}
		static void Unhook() {
			if (g_Hook != 0) {
				UnhookWindowsHookEx(g_Hook);
				g_Hook = 0;
			}
		}
	};
};

public ref class KeyboardHookEventArgs
{
private:
	bool block;
	int code;
	int wParam;
	int lParam;

public:
	property bool Block
	{
		bool get()
		{
			return block;
		}
		void set(bool value)
		{
			block = value;
		}
	}

	property int Code
	{
		int get()
		{
			return code;
		}

		void set(int value)
		{
			code = value;
		}
	}

	property int WParam
	{
		int get()
		{
			return wParam;
		}

		void set(int value)
		{
			wParam = value;
		}
	}

	property int LParam
	{
		int get()
		{
			return lParam;
		}

		void set(int value)
		{
			lParam = value;
		}
	}

	KeyboardHookEventArgs()
	{
		block = false;
		code = 0;
		wParam = 0;
		lParam = 0;
	}
	
	KeyboardHookEventArgs(int code, int wParam, int lParam)
	{
		this->code = code;
		this->wParam = wParam;
		this->lParam = lParam;
		this->block = false;
	}

	KeyboardHookEventArgs(int code, int wParam, int lParam, bool block)
	{
		this->code = code;
		this->wParam = wParam;
		this->lParam = lParam;
		this->block = block;
	}
};

public delegate void KeyboardHookDelegate(KeyboardHookEventArgs^ e);