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Multiple instances

Posted on 1998-12-22
Last Modified: 2010-05-03
How do you keep a person from opening several instances
of a program? The previnstance wants an object as the
parameter, not an exe name....
Question by:WPentecost
  • 2

Expert Comment

ID: 1452025
IF the program is yours, you need to use the App object, App.PrevInstance

Expert Comment

ID: 1452026
if you want the EXE name to be passed in as a parameter, then try FindWindow and SetFocus API calls.



Accepted Solution

dm_14 earned 20 total points
ID: 1452027
1. Place the following code in your apps Sub Main () or form_load procedure

if App.PrevInstance then
 msgbox "App is already available"
end if

2. Try to run two instances of your app, the above message will be displayed and the program will terminate.

This will prevent a person from running multiple instances of a program.

Expert Comment

ID: 1452028
didn't I already suggest that?

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