I have a Windows application that should respond in a specific way to a mouse click on menu choice when a modifier key is depressed. Specifically the Windows application is looking for a Ctrl+Shift mouse click on a menu item. However, the application behaves as if I just clicked the menu option with no modifier keys at all pressed. I'm running this application on Windows 10 in a Parallels VM on my mac. I expected that I needed to use Shift+Option on my mac keyboard instead of Shift+Ctrl but that doesn't do it either. I'm curious if something in keyboard mapping from mac to parallels to windows to application needs to be done to enable this action. Any thoughts on how to debug this?