The 'postFlashEvent' command has the following interface:

'postFlashEvent', breadcrumb [, hostingUrl][, optionalVariables]

 

Example of use:

// When tracking from a Flash movie. It's a good idea to make a global 
// javascript function you send events information to from inside Flash.
function flashTrack(breadCrumb) {
 
   $netminers.push(
         ['postFlashEvent', breadCrumb]
   );
}

 

The AS3/Flash source file: 
import flash.external.*
 
var btn:MovieClip = createButton(100, 100);
btn.onPress = function() {
 
   var breadbrumb = 'Frontpage/Product/Dolls/Customize Barbie';
 
   // Track directly from Flash
   ExternalInterface.call('$netminers.push', new Array("postFlashEvent", breadbrumb));
 
   // Or try calling the javascript function in Flash (a preferred approach)
   ExternalInterface.call('flashTrack', breadbrumb);
}
 
function createButton(width:Number, height:Number):MovieClip {
 
    var mc:MovieClip = this.createEmptyMovieClip("mc");
...
    return mc;
}