How to add new auto-complete options in TeXnicCenter?

Question

When I type "ite" in TeXnicCenter, I see the autocomplete option:

\begin{itemize}
    \item 
\end{itemize} 

Pressing ctrl+space will activate the auto-completion. How do I add additional auto-completion options?

In particular, I would like "ali" to activate

\begin{align}

\end{align}

upon pressing ctrl+space.

Answer 1

In your TeXnicCenter installation folder and subfolders look out for xml files, such as base.xml and math.xml. Edit these files or create your own xml file.

Some example lines for align autocompletion:

<lxEnvironment name="align"
        parameters="1" 
        desc="Math environment"
        icon="math.bmp"
        index="10"
        expafter="}&#xA;&#x9;&amp; \\%&#xA;\end{align}" 
        expbefore="\begin{" />

Houston has posted instructions and a customized xml file here: Missing autocompletition for \paragraph. The align example is taken from that file.