# Macro Library construct2

Construct2 integration functions, Version 0.1, Dec 18, 2013

- addConstruct2

### addConstruct2

addConstruct2(url,[width,height,params,qn,part])
place a Construct2 HTML5 applet, using the HTML file specified in URL
the applet must have the imathas postMessage shim added to the scripts
params should be key=>value array of values to send to Construct2 via the query string, like
array('a'=>3,'name'=>'Fred')
these will be readable in Construct2 using Browser.QueryParam("name")
if you want to read values from Construct2 provide
question number(1-indexed - usually use $thisq)
and if multipart, part number (0-indexed)
IMathAS doesn't request values - Construct2 has to send them.
Use Browser.QueryParam("imathasqn") to read the imathas question number, then
form a returnstring text variable like:
imathasqn&"::"&myvar&","&anothervar
to send back, use Browser -> Execute Javascript like this:
"parent.postMessage('"&returnstring&"','*')"
see http://www.imathas.com/misc/basicimathasex.capx for an example