Stop Multiple Instances

[bhansen]

Is there a way to prevent multiple instances of a program from running?

Example I have a custom database application that my users will occasionally minimize and open a second instance. This can cause some problems.

Any suggestions.

Thanks

 

[browolf]

is there's any authentication within the program, there's probably some way of programing it to only let them in once.

otherwise maybe you can write an encapsulating vbscript that can have a flag that can indicate if it's already running.

e.g.

icons runs vbscript
vbscript runs application
vbscript pauses whilst application open

pseudocode:

'start
look for flag.
if flag exists then
msg program open already
exit script
else
create flag
run program
... << program runing
<program closed vbscript continues>
del flag
end if


wscript.run has optional parameter
bWaitOnReturn. Optional. If bWaitOnReturn is not specified or FALSE, immediately returns to script execution rather than waiting for the process to end.

^^ this is theoretically possible. ===============
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