stop multi instantes of program on one machine

[id10t error]

Hi,

I am sorry that my description is not better but it is hard to think
of one for this problem. I have a program on the user computer and I
need to only let them have one instants of this program open at one
time. Is there a way to check to see if the program in already running
and not let them open it?

Thank you in advance for your help.

[rowe_newsgroups]

On May 1, 9:17 am, id10t error <[e-mail]:

Hi,

I am sorry that my description is not better but it is hard to think
of one for this problem. I have a program on the user computer and I
need to only let them have one instants of this program open at one
time. Is there a way to check to see if the program in already running
and not let them open it?

Thank you in advance for your help.

There is a setting on the application's property pages called "Single
Instance Application" or something similar - you should check that
option.

Thanks,

Seth Rowe [MVP]

[Michel Posseth [MCP]]

Seth

I believe this option was introduced in the 2005 version of VS ( i use 2008
now so can`t check that for sure )

if the TS is using a version < 2005 of VS he migh investigate the diverse
postings that use a Mutex

see for instance http://www.freevbcode.com/ShowCode.Asp?ID=5845
or my own version :-) wich is Terminal server proof
http://www.freevbcode.com/ShowCode.asp?ID=7654

HTH

Michel

"rowe_newsgroups" <ro********@yahoo.comschreef in bericht
news:29**********************************@x35g2000 hsb.googlegroups.com...

On May 1, 9:17 am, id10t error <[e-mail]:

>Hi,

I am sorry that my description is not better but it is hard to think
of one for this problem. I have a program on the user computer and I
need to only let them have one instants of this program open at one
time. Is there a way to check to see if the program in already running
and not let them open it?

Thank you in advance for your help.

There is a setting on the application's property pages called "Single
Instance Application" or something similar - you should check that
option.

Thanks,

Seth Rowe [MVP]

[id10t error]

On May 1, 9:30*am, rowe_newsgroups <[e-mail]:

On May 1, 9:17 am, id10t error <[e-mail]:

Hi,

I am sorry that my description is not better but it is hard to think
of one for this problem. I have a program on the user computer and I
need to only let them have one instants of this program open at one
time. Is there a way to check to see if the program in already running
and not let them open it?

Thank you in advance for your help.

There is a setting on the application's property pages called "Single
Instance Application" or something similar - you should check that
option.

Thanks,

Seth Rowe [MVP]

Seth,

That worked great. Thank you for your help

[kimiraikkonen]

On May 1, 6:05 pm, id10t error <[e-mail]:

On May 1, 9:30 am, rowe_newsgroups <[e-mail]:

On May 1, 9:17 am, id10t error <[e-mail]:

Hi,

I am sorry that my description is not better but it is hard to think
of one for this problem. I have a program on the user computer and I
need to only let them have one instants of this program open at one
time. Is there a way to check to see if the program in already running
and not let them open it?

Thank you in advance for your help.

There is a setting on the application's property pages called "Single
Instance Application" or something similar - you should check that
option.

Thanks,

Seth Rowe [MVP]

Seth,

That worked great. Thank you for your help

Hi,
You can also check this out:
http://www.bobpowell.net/singleinstance.htm

or it can be done by querying application's current entity using
process class.

Thanks,

Onur

[Tom Shelton]

On 2008-05-01, kimiraikkonen <ki*************@gmail.comwrote:

On May 1, 6:05 pm, id10t error <[e-mail]:

>On May 1, 9:30 am, rowe_newsgroups <[e-mail]:

On May 1, 9:17 am, id10t error <[e-mail]:

Hi,

I am sorry that my description is not better but it is hard to think
of one for this problem. I have a program on the user computer and I
need to only let them have one instants of this program open at one
time. Is there a way to check to see if the program in already running
and not let them open it?

Thank you in advance for your help.

There is a setting on the application's property pages called "Single
Instance Application" or something similar - you should check that
option.

Thanks,

Seth Rowe [MVP]

Seth,

That worked great. Thank you for your help

Hi,
You can also check this out:
http://www.bobpowell.net/singleinstance.htm

or it can be done by querying application's current entity using
process class.

Thanks,

Onur

Another process name method... I always try to warn people off of this
method. It's just as easy to use a mutex and less dangerous. I know
the chance is small - but process names are not necessarily unique.
There is nothing stopping me from creating an application names
notepad.exe. If I were to use this method, then if the user starts the
real notepad, they can't start mine. I know that's extreme and
contrived - but, it isn't an impossible situation. Using a named mutex,
is generally a safer way to go.

--
Tom Shelton

[kimiraikkonen]

On May 1, 7:01 pm, Tom Shelton
<[e-mail]:

On 2008-05-01, kimiraikkonen <[e-mail]:

On May 1, 6:05 pm, id10t error <[e-mail]:

On May 1, 9:30 am, rowe_newsgroups <[e-mail]:

On May 1, 9:17 am, id10t error <[e-mail]:

Hi,

I am sorry that my description is not better but it is hard to think
of one for this problem. I have a program on the user computer and I
need to only let them have one instants of this program open at one
time. Is there a way to check to see if the program in already running
and not let them open it?

Thank you in advance for your help.

There is a setting on the application's property pages called "Single
Instance Application" or something similar - you should check that
option.

Thanks,

Seth Rowe [MVP]

Seth,

That worked great. Thank you for your help

Hi,
You can also check this out:
http://www.bobpowell.net/singleinstance.htm

or it can be done by querying application's current entity using
process class.

Thanks,

Onur

Another process name method... I always try to warn people off of this
method. It's just as easy to use a mutex and less dangerous. I know
the chance is small - but process names are not necessarily unique.
There is nothing stopping me from creating an application names
notepad.exe. If I were to use this method, then if the user starts the
real notepad, they can't start mine. I know that's extreme and
contrived - but, it isn't an impossible situation. Using a named mutex,
is generally a safer way to go.

--
Tom Shelton

Tom,
That's a good point, blocking an application by its name can cause
conflicts with the applications that have the same name, though it's
not common but possible as you stated.

Also another point might be, the user can start application by
changing application name before launch, so this way(GetProcessByname)
won't avoid your application to be executed more than once by a
clever user.

Thanks :)

Onur

[Michel Posseth [MCP]]

"kimiraikkonen" <ki*************@gmail.comschreef in bericht
news:70**********************************@a23g2000 hsc.googlegroups.com...

On May 1, 7:01 pm, Tom Shelton
<[e-mail]:

>On 2008-05-01, kimiraikkonen <[e-mail]:

On May 1, 6:05 pm, id10t error <[e-mail]:
On May 1, 9:30 am, rowe_newsgroups <[e-mail]:

On May 1, 9:17 am, id10t error <[e-mail]:

Hi,

I am sorry that my description is not better but it is hard to
think
of one for this problem. I have a program on the user computer and
I
need to only let them have one instants of this program open at
one
time. Is there a way to check to see if the program in already
running
and not let them open it?

Thank you in advance for your help.

There is a setting on the application's property pages called
"Single
Instance Application" or something similar - you should check that
option.

Thanks,

Seth Rowe [MVP]

>Seth,

>That worked great. Thank you for your help

Hi,
You can also check this out:
http://www.bobpowell.net/singleinstance.htm

or it can be done by querying application's current entity using
process class.

Thanks,

Onur

Another process name method... I always try to warn people off of this
method. It's just as easy to use a mutex and less dangerous. I know
the chance is small - but process names are not necessarily unique.
There is nothing stopping me from creating an application names
notepad.exe. If I were to use this method, then if the user starts the
real notepad, they can't start mine. I know that's extreme and
contrived - but, it isn't an impossible situation. Using a named mutex,
is generally a safer way to go.

--
Tom Shelton

Tom,
That's a good point, blocking an application by its name can cause
conflicts with the applications that have the same name, though it's
not common but possible as you stated.

Also another point might be, the user can start application by
changing application name before launch, so this way(GetProcessByname)
won't avoid your application to be executed more than once by a
clever user.

Thanks :)

Onur

Onur

If you would have clicked on my example ( the second link that is
Terminal server capable ) you would have seen that there is a simple
solution for that problem
instead of creating a mutex by name you create one by application GUID
HTH

Michel

[Mayur H Chauhan]

Here we have one catch. Checking the Checkbox of single instance would work
fine for Single login machine. In case of machines (OS) where multiple user
can login at same time, this won't work. This checkbox setting works for
that that login. If other user login on same machine, then there is
possiblity that second instance can start of same application.

Thanks,
Mayur H Chauhan

"Tom Shelton" <to*********@YOUKNOWTHEDRILLcomcast.netwrote in message
news:eK**************@TK2MSFTNGP04.phx.gbl...

On 2008-05-01, kimiraikkonen <ki*************@gmail.comwrote:

>On May 1, 6:05 pm, id10t error <[e-mail]:

>>On May 1, 9:30 am, rowe_newsgroups <[e-mail]:

On May 1, 9:17 am, id10t error <[e-mail]:

Hi,

I am sorry that my description is not better but it is hard to think
of one for this problem. I have a program on the user computer and I
need to only let them have one instants of this program open at one
time. Is there a way to check to see if the program in already
running
and not let them open it?

Thank you in advance for your help.

There is a setting on the application's property pages called "Single
Instance Application" or something similar - you should check that
option.

Thanks,

Seth Rowe [MVP]

Seth,

That worked great. Thank you for your help

Hi,
You can also check this out:
http://www.bobpowell.net/singleinstance.htm

or it can be done by querying application's current entity using
process class.

Thanks,

Onur

Another process name method... I always try to warn people off of this
method. It's just as easy to use a mutex and less dangerous. I know
the chance is small - but process names are not necessarily unique.
There is nothing stopping me from creating an application names
notepad.exe. If I were to use this method, then if the user starts the
real notepad, they can't start mine. I know that's extreme and
contrived - but, it isn't an impossible situation. Using a named mutex,
is generally a safer way to go.

--
Tom Shelton