I could really use some good explanation of matrixctrl. It isn't in the Max45ReferenceManual (although it is referred-to repeatedly). I am gradually figuring it out, but it sure would be nice to just have some documentation instead of a black box. I see in some threads you can send in arguments like getrow and getcol - again, no doc to be found. Am I looking in the wrong place (Documentation folder of my MaxMSP 4.6 install)?
Also, I saw somewhere something mentioned on some thread about an object called lrow that converts 8 binary values to a 0-255 bitmask value like what you send to an LED grid driver... I can't find anything about this either. Maybe I made it up.