When running musicbee from the command line, the following parameters are accepted:
/Play xxxx /QueueNext xxxx /QueueLast xxxx /PlayPause /PlayResume /Next /Previous /Stop /StartAutoDj /OpenCompactPlayer /OpenMiniPlayer /OpenMainPlayer /OpenMainPlayerLocked /VolumeDown /VolumeUp /PlayLibraryShuffled /OpenMainPlayer /OpenMainPlayerLocked
where xxxx is a file, a web url, a folder, a cuesheet or a playlist.