One application instance with hidden window scenario

[Joe Harrison]

Hello.

I have an application which I check to see if there is another running
instance at startup. If there is another running instance, I set
focus to the existing instance. I am using code that I found on a
webpage to do this (Code I am using is at the bottom of this post).
When the application is minimized, the form is hidden and an icon
appears in the System Tray. My problem is that when I run another
instance, the new instance attempts to set focus to the hidden window.
The window does not reappear. Can I modify the code to not only make
sure that the window is in focus, but to Show the window as well?

Thanks.
-Joe

CODE:

[STAThread]
static void Main()
{
//Get the running instance.
Process instance = RunningInstance ();
if (instance == null)
{
//There isn't another instance, show our form.
Application.Run (new frmMain());
}
else
{
//There is another instance of this process.
HandleRunningIn stance(instance );
}
}

public static Process RunningInstance ()
{
Process current = Process.GetCurr entProcess();
Process[] processes = Process.GetProc essesByName
(current.Proces sName);

//Loop through the running processes in with the same name
foreach (Process process in processes)
{
//Ignore the current process
if (process.Id != current.Id)
{
//Make sure that the process is running from the exe file.
if (Assembly.GetEx ecutingAssembly ().Location.Rep lace("/", "\\") ==
current.MainMod ule.FileName)
{
//Return the other process instance.
return process;
}
}
}

//No other instance was found, return null.
return null;
}
public static void HandleRunningIn stance(Process instance)
{
//Make sure the window is not minimized or maximized
ShowWindowAsync (instance.MainW indowHandle , WS_SHOWNORMAL);

//Set the real intance to foreground window
SetForegroundWi ndow (instance.MainW indowHandle);
}

[DllImport("User 32.dll")]
private static extern bool ShowWindowAsync (
IntPtr hWnd, int cmdShow);
[DllImport("User 32.dll")] private static extern bool
SetForegroundWi ndow(IntPtr hWnd);
private const int WS_SHOWNORMAL = 1;