Run a Windows application without displaying its GUI

Is there a way to run a Windows application without displaying its GUI window?

I have a 3rd party Windows application which does not have any command line parameter or switch to suppress its GUI. I need to start it in the background, and interact only programmatically with it, using data exchange APIs published by that 3rd party app.

I tried creating a Task in Task Scheduler with the Hidden check box, but even then when I start the task manually, the app's window is getting displayed. I guess the app is programmed to bring itself to focus after startup.

I need this solution for Windows 7.

Thanks.

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