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Highlighting of keywords, comments, strings etc. can be accomplished
with font-lock. If you are using global-font-lock-mode
(in Emacs), or have font-lock turned on in any other buffer in
XEmacs, it should also automatically work in IDLWAVE buffers. If you’d
prefer invoking font-lock individually by mode, you can enforce it in
idlwave-mode with the following line in your .emacs:
(add-hook 'idlwave-mode-hook 'turn-on-font-lock)
IDLWAVE supports 3 increasing levels of syntax highlighting.
The variable font-lock-maximum-decoration determines which level
is selected. Individual categories of special tokens can be selected
for highlighting using the variable
idlwave-default-font-lock-items.
Items which should be fontified on the default fontification level 2.