Extension methods and useful features to add to WinForms projects

Application.Helper.cs

using System;
using System.Diagnostics;

namespace System.Windows.Forms.Helpers
{
	public class ApplicationHelper
	{
		/// <summary>
		/// Check if current process already running. If running, set focus to existing process and 
		/// returns <see langword="true"/> otherwise returns <see langword="false"/>.
		/// </summary>
		/// <returns><see langword="true"/> if it succeeds, <see langword="false"/> if it fails.</returns>
		public static bool IsAlreadyRunning()
		{
			/*
			const int SW_HIDE = 0;
			const int SW_SHOWNORMAL = 1;
			const int SW_SHOWMINIMIZED = 2;
			const int SW_SHOWMAXIMIZED = 3;
			const int SW_SHOWNOACTIVATE = 4;
			const int SW_RESTORE = 9;
			const int SW_SHOWDEFAULT = 10;
			*/
			const int swRestore = 9;

			Process thisProcess = Process.GetCurrentProcess();
			Process[] processes = Process.GetProcessesByName(thisProcess.ProcessName);

			if (processes.Length > 1)
			{
				for (int i = 0; i < processes.Length; i++)
				{
					if (processes[i].Id != thisProcess.Id)
					{
						// Get the window handle
						IntPtr hWnd = processes[i].MainWindowHandle;

						// If iconic, restore the window
						if (NativeMethods.IsIconic(hWnd))
						{
							NativeMethods.ShowWindowAsync(hWnd, swRestore);
						}

						// Bring it to the foreground
						NativeMethods.SetForegroundWindow(hWnd);
						break;
					}
				}
				return true;
			}

			return false;
		}
	}
}