static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(true);
string title = "KeyMagic";
bool beta = Properties.Settings.Default.BetaRelease;
if (beta) title += " (beta)";
string mutexName = "\u1000\u1001";
// http://stackoverflow.com/questions/229565/what-is-a-good-pattern-for-using-a-global-mutex-in-c/229567
using (var mutex = new Mutex(false, mutexName))
{
// edited by Jeremy Wiebe to add example of setting up security for multi-user usage
// edited by 'Marc' to work also on localized systems (don't use just "Everyone")
var allowEveryoneRule = new MutexAccessRule(new SecurityIdentifier(WellKnownSidType.WorldSid, null), MutexRights.FullControl, AccessControlType.Allow);
var securitySettings = new MutexSecurity();
securitySettings.AddAccessRule(allowEveryoneRule);
mutex.SetAccessControl(securitySettings);
//edited by acidzombie24
var hasHandle = false;
try
{
try
{
// note, you may want to time out here instead of waiting forever
//edited by acidzombie24
//mutex.WaitOne(Timeout.Infinite, false);
hasHandle = mutex.WaitOne(100, false);
if (hasHandle == false) //another instance exist
{
IntPtr pWnd = NativeMethods.FindWindow(null, title);
if (pWnd != IntPtr.Zero)
{
NativeMethods.ShowWindow(pWnd, 0x05);
}
return;
}
}
catch (AbandonedMutexException)
{
// Log the fact the mutex was abandoned in another process, it will still get aquired
}
frmMain f = new frmMain();
Application.Run();
}
finally
{
//edit by acidzombie24, added if statemnet
if (hasHandle)
mutex.ReleaseMutex();
}
}
}
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(true);
string title = "KeyMagic";
bool beta = Properties.Settings.Default.BetaRelease;
if (beta)
{
title += " (beta)";
}
string mutexName = "\u1000\u1001";
// http://stackoverflow.com/questions/229565/what-is-a-good-pattern-for-using-a-global-mutex-in-c/229567
using (var mutex = new Mutex(false, mutexName))
{
// edited by Jeremy Wiebe to add example of setting up security for multi-user usage
// edited by 'Marc' to work also on localized systems (don't use just "Everyone")
var allowEveryoneRule = new MutexAccessRule(new SecurityIdentifier(WellKnownSidType.WorldSid, null), MutexRights.FullControl, AccessControlType.Allow);
var securitySettings = new MutexSecurity();
securitySettings.AddAccessRule(allowEveryoneRule);
mutex.SetAccessControl(securitySettings);
//edited by acidzombie24
var hasHandle = false;
try
{
try
{
// note, you may want to time out here instead of waiting forever
//edited by acidzombie24
//mutex.WaitOne(Timeout.Infinite, false);
hasHandle = mutex.WaitOne(100, false);
if (hasHandle == false) //another instance exist
{
IntPtr pWnd = NativeMethods.FindWindow(null, title);
if (pWnd != IntPtr.Zero)
{
NativeMethods.ShowWindow(pWnd, 0x05);
}
return;
}
}
catch (AbandonedMutexException)
{
// Log the fact the mutex was abandoned in another process, it will still get aquired
}
frmMain f = new frmMain();
Application.Run();
}
finally
{
//edit by acidzombie24, added if statemnet
if (hasHandle)
{
mutex.ReleaseMutex();
}
}
}
}