Data Masking within Display driver levels

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I have one existing application that shows the SSN on the screen. Now without modifying that existing application, I would like to deploy it one call center assoicate's machine, yet not allowing the callcenter associate to view the SSN. At the same time, if the same application is deployed on any other authorized employee's machine, the SSN should be made accesible.

I thought, I could have this masking configuration in some other application that spies what is displayed on the screen by the actual application and does all masking. Ofcoure, this new application should be intelligent enough to find such sensitive data on the screen displayed by the original application .......

Hope this clarifies .... Please provide me with all your suggestions .. since I am new this driver level programming and all, any examples are welcome ....

Thanks
Ramesh

Posted 23-Dec-09 5:28am

rb.karanam

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Rick Shaub · Answer 1 · 2009-12-23T06:43:00

If your other application uses standard windows controls, you may be able to use P/Invoke to send the WM_SETTEXT message to the control that displays the SSN. You'll need to come up with a way to get the handle for the control. Spy ++ is a good tool for that. See the links below to get started.

SendMessage[^]

WM_SETTEXT[^]