Unable to simulate Ctrl+Shift+Fn+F10 Key press

I have an ubuntustudio 16.10 64 bit on an IBM Thinkpad E431. I am able to launch an app from a shell script, but the next step involves pressing Ctrl+Shift+F10 On my notebook I need to press the button Fn before F10 . I use xfce Desktop. I am unable to simulate this in a shell script. I had also disabled my touchpad but did not help.

How to make Compose work in GTK and Qt apps?

I used Gnome for a long time, but preferred vanilla X input method (xim) over the default GTK behaviour. I just set GTK_IM_MODULE and QT_IM_MODULE environment variables to xim, and didn’t have any problem with multiple-layout config, Compose key, custom ~/.XCompose and misc:typo typography extensions.