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For instruction on how to set a registry key for Remote Desktop Execution, refer to PressKeys Action Does not Execute on an Inactive Screen.
After setting the registry keys, when you minimize the Remote Desktop Connection or VM window on your computer, this will not affect the VM’s GUI and the press keys will happen, the way it happens on the active screen.
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When set to true, Qualitia internally uses the selenium web driver's Actions class to press keys. Selenium does not support some keys, which are mentioned in Using Actions class provided by Selenium Web driver.