Passing command-line arguments to another instance

[Peter Morris]

I have made my app single-instance using a Mutex but now need to pass on the
command line parameters too. I tried using remoting but wasn't happy with
this approach as the windows firewall asks if I want to permit it to open
the socket.

I was thinking maybe there was a simple WinApi way of sending a string to
the existing instance? Any help appreciated, it's quite a vital part of my
app's functionality


Thanks


Pete

 

[Marc Gravell]

If you had remoting code that was "nearly there", try changing it to use
IPC:

http://weblogs.asp.net/israelio/archive/2005/01/04/346180.aspx

Marc

 

[Peter Morris]

I saw something similar and tried ICP but used the tcp:// prefix, I will try
this, thanks!

 

[Ben Voigt [C++ MVP]]

I have made my app single-instance using a Mutex but now need to pass
on the command line parameters too. I tried using remoting but
wasn't happy with this approach as the windows firewall asks if I
want to permit it to open the socket.

I was thinking maybe there was a simple WinApi way of sending a
string to the existing instance? Any help appreciated, it's quite a
vital part of my app's functionality

You could use a mailslot or pipe instead of a mutex, then you can pass data
through it (i.e. TransactNamedPipe).

 

[Peter Morris]

It seems that I was originally just using the IpcChannel incorrectly, the
URL helped me to realise this, thanks!

http://mrpmorris.blogspot.com/2008/07/single-instance-application.html


Pete

 

[kyle.szklenski]

Not sure if you still care, but I just saw this:

http://www.hanselman.com/blog/TheWe...stanceWinFormsAndMicrosoftVisualBasicdll.aspx

It may not be exactly what you want, though. It is almost certainly
way easier than using a Mutex and such, though.

Kyle