Simulate Keystrokes for an executable run by System Exec.vi ?

I have an executable that I call using System Exec.vi. The executable opens when I use system exec, but it needs CTRL + S to run. So I want to simulate that keystroke. Also, once it completes, I want to simulate keystrokes to close. In short, I do not want the user to do anything other than run the VI which has system exec.vi. Everything else is done by simulating keystrokes which in turn depend on some conditions I would generate. Thanks.
Kudos always welcome for helpful posts

The attached vi shows how to simulate keystrokes. Send the Control Key down code, S key down code, S key up code, then control key up code.
- tbob
Inventor of the WORM Global
Attachments:
Keystrokes.vi ‏39 KB

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Hello,
It seems that issue is related to certificate. Could you please upload certificate to central admin and make it trust.
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http://social.technet.microsoft.com/Forums/en-US/cbc58585-1673-4c91-b8c1-1b95c339bbb7/could-not-establish-trust-relationship-for-the-ssltls-secure-channel?forum=fastsharepoint
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