Gets the active command in this queue.

Gets a value indicating whether this command queue can do a current command (so there's a command left to execute) (true) or false if no more commands can be executed in this queue.

Gets a value indicating whether this command queue can undo the last executed command (so there are commands left to undo) (true), or false if no more commands can be undone in this queue.

Gets the number of commands in this queue