Check whether an application is running

[pnp]

What's the best way to check whether an app is running so if one tries to
open it again it will not open a second instance of the application but will
give focus to the already open one maximizing it...

-Peter

[John Nelson]

In article <uw**************@TK2MSFTNGP09.phx.gbl>, "pnp" <pnp.at.softlab.ece.ntua.gr>
says...

What's the best way to check whether an app is running so if one tries to
open it again it will not open a second instance of the application but will
give focus to the already open one maximizing it...

-Peter

Try this in your main...

=====================================

System.Threading.Mutex appMutex = new System.Threading.Mutex(true,"AppName");

if(appMutex.WaitOne(0, false))
{
try
{
Application.Run(new FormMain());
}
catch(Exception EX)
{
MessageBox.Show("Application Error!!\r\n" + EX.Message);
}

}
else
{

MessageBox.Show("The application is already loaded.");
}
=====================================

[pnp]

thanks John.

"John Nelson" <ne**@scapeware.com> wrote in message
news:MP************************@news.comcast.gigan ews.com...

In article <uw**************@TK2MSFTNGP09.phx.gbl>, "pnp" <pnp.at.softlab.ece.ntua.gr> says...

What's the best way to check whether an app is running so if one tries to open it again it will not open a second instance of the application but will give focus to the already open one maximizing it...

-Peter
Try this in your main...

=====================================

System.Threading.Mutex appMutex = new

System.Threading.Mutex(true,"AppName");
if(appMutex.WaitOne(0, false))
{
try
{
Application.Run(new FormMain());
}
catch(Exception EX)
{
MessageBox.Show("Application Error!!\r\n" + EX.Message);
}

}
else
{

MessageBox.Show("The application is already loaded.");
}
=====================================

[Mark Rae]

"John Nelson" <ne**@scapeware.com> wrote in message
news:MP************************@news.comcast.gigan ews.com...

System.Threading.Mutex appMutex = new System.Threading.Mutex(true,"AppName");
if(appMutex.WaitOne(0, false))
{
try
{
Application.Run(new FormMain());
}
catch(Exception EX)
{
MessageBox.Show("Application Error!!\r\n" + EX.Message);
}

}
else
{

MessageBox.Show("The application is already loaded.");
}
=====================================

I use something similar to this pretty much in every WinForms app I write as
a replacement for the old VB "App.PrevInstance()" function if I need to
prevent more than one instance of the app running...