Hi Snooks, thank you for your effort in creating this dll.
The file does work as intended, when play is pressed in Reaper the keyboard play button lights up and when the play button is pressed on the keyboard the play works in Reaper.
The transport on the keyboards uses the MCU control surface protocol as detailed here
https://support.native-instruments.c...st-Integration
The problem is how the other buttons (shift,encoders,cursor keys) are implemented as they do not send any sysex when pressed (although the dll Cubase uses to control the keyboard unlocks this and the buttons then send the extra data via midi).
Thank you for your efforts