[kenbla]

Hello,
I would like to limit the number of times a user can open a particular window/form from my application! Are there any Windows API calls that I can issue to find out this?
Regards,
kenbla

[Chicon]

Hi kenbla,

Welcome to TSG !

You've just to set a counter in a file. You increment the counter each time the user starts your application and when the limitation is reached, you force the application to exit.
Also, if you mean to limit the usage restriction for a defined period, then use the timestamp utilities on the file in order to reset the counter.

[kenbla]

Thanks Chicon.
I already have the counter but what's the Windows command to retrieve the number of forms already started by a user?
In my application the user can start a number of non-modal forms and I want to limit the number of started forms by each user to 2 or 3.
The started forms must be non-modal for different reasons!

[Chicon]

If VB is your programming language, you can use the Count method of the Forms collection object.
Indeed, Forms.Count will give the value of the opened forms. Forms is managed by VB and provides informations about loaded forms in the application.