Restrict copy paste

Hello all,

I want to restrict the copy paste functionality in my application as follow -
- When one copy and wants to paste text within the same application then the text should be pasted else not being able to paste the text outside the application
-Similarly when someone wants to copy the text from outside application and paste it within the application then it should not be allowed.
Currently my application is working fine if there is only one instance of application. But it creates the problem if there are more then one instances of that application.

I’m creating this application using the web browser control.

Thanks