Performs command if the last conditional command returned the value returncode. Instead of the numeric values 0 (no match), 1 (match), -1 (error), and -2 (break) the symbolic names "NoMatch", "Match", "Error" and "Break" can be used. If no returncode is given, the default 0 is assumed. If the return code is prefixed with '!', the command is executed if returncode does not match the value returned by the conditional command. The TestRc command can only be used inside functions. If the command is another conditional command, the previous return code is replaced by the new one. Example:

AddToFunc ToggleXterm
+ I All (my_xtermwindow) Close
+ I TestRc (NoMatch) Exec xterm -T my_xtermwindow