Help in Preflight

i want find errors in pdf using preflight, using following code wanted know preflight object is? how declare it? not compiling.

i using acrobat ole using javascript.  

 

var oprofile = preflight.getprofilebyname("magazine ads")
if( oprofile != undefined )
{    
var othermometer = app.thermometer; 
   var mypreflightresult = this.preflight( oprofile, false, othermometer); 
   if( mypreflightresult.numerrors > 0 )
{  

console.println( "preflight found " + mypreflightresult.numerrors + " errors.");
}
else
{    
console.println( "preflight found no errors.");
}

what version of acrobat have?

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