Yes. I use CAMD for inter-task comms all the time. Most MIDI messages are three bytes or less, but System Exclusive messages can be longer, within reason. All messages are passed between named ports. there are very few rules on how the names are formatted. You MUST use unique names, so it may be wise to check if a name is already in use, and add an (increasing) digit to follow or make it unique by some other means. As long as you can format it as "legal" MIDI messages, have fun!. Remember a few details: If multiple streams are sent to the same destination, they will be simply mixed together at reception. the receiver CAN tell from where each message came if it cares to look. You can also send multiple streams FROM a given port, each destination gets a copy of the messages. So mixing (merging) is easy, as is multicasting. To make your program appear as a port... there is nothing to do. Just give it a name that (hopefully) helps people understand what it is. All named ports (that aren't specifically hidden) will appear in the port requester. As an example, the USB MIDI driver is not really a "driver", it's a simple program. There's no difference betweeen a driver and a program, they all meet in the same place, and all interconnect by the same means. Say I wanted to merge MIDI messages from: My Behringer "BCR2000" control surface, My "VMeter" volume touch slider, and the big knob on the front of my audio mixer... I just create a named "meeting place", which I call "mix". MidiThru is a simple patch cord with two required arguments, from and to.. MidiThru VMeter.in.0 mix MidiThru BCR2000.in.0 mix MidiThru MBMixer.in mix Now all three are combined, at the (imaginary) port called "mix" Let's connect the output to all three as well: MidiThru mix VMeter.out.0 MidiThru mix MBMixer MidiThru mix BCR2000 OK, so if ANY of those controls changes volume, the mixer (MBMix) will adjust accordingly, and ALL THREE of the control surfaces will move together. Like magic! Bars&Pipes can simply send volume change messages to "mix" and it will control the audio mixer, and all three devices will move together in sync. This example is exactly what I have running 24/7. Simple and reliable. More questions? Feel free to ask here, or you can email me personally, however you prefer. I am always happy to get camd working for different applications.