tex-send-command

tex-send-command is a compiled Lisp function in `tex-mode.el'.

(tex-send-command COMMAND &optional FILE BACKGROUND)

Send COMMAND to TeX shell process, substituting optional FILE for *.
Do this in background if optional BACKGROUND is t. If COMMAND has no *,
FILE will be appended, preceded by a blank, to COMMAND. If FILE is nil, no
substitution will be made in COMMAND. COMMAND can be any expression that
evaluates to a command string.

Return the process in which TeX is running.