Great article. Was really helpfull.

I have a Visual c++ application that can change variables in flash, but I have been trying to modify some of those variables in flash and read them back in visual studio. The problem ofcourse if that root.loaderInfo.parameters is read only. Do you have any idea how I can do this?

Thanks in advance!

Thanks for sharing your code!

I’m surprised the scale param doesn’t seem to work for you when you add it to the HTML. Are you also setting the salign param to tl (top left)? By happenstance, I recently tested scale (in the HTML) with percentage-based width and heights, but I don’t think I tested for pixel-based. Interesting.

In any case, I’m glad to hear that the ActionScript approach is working for you!

stage.scaleMode = StageScaleMode.NO_SCALE;
stage.align = StageAlign.TOP_LEFT;

var params:Object = LoaderInfo(this.root.loaderInfo).parameters;
player.source = params.file; // ‘file’ is a flashvar that gets passed from the flashvars attribute of the object or embed tag
player.width = stage.stageWidth;
player.height = stage.stageHeight;

I noticed that I had to include the scaleMode and align settings in the ActionScript — if I put them as attributes of the object/embed tag, it wouldn’t work. (For example, ’scale=”noscale”‘ seemed not to change anything.) I’d be curious if anyone knew why that’s the case.

I haven’t tried accessing LoaderInfo.parameters from a C/C++ container, but according to the docs, the parameters property is read-only, which doesn’t surprise me. The Loader class deals with GET and POST data, so for your scenario, I think you’ll be needing the ExternalInterface class.

I am using VC++ which plays an SWF file. In the C++ code, .put_FlashVars works (flash receives the variable in root.loaderInfo.parameters. but .get_FlashVars() returns null. Now I am clueless.

Thank you again.

Thanks for that alternate approach! The query string approach you mentioned works in older versions of Flash Player, in addition to current versions, while FlashVars requires Flash Player 6 or higher — so like you, I’m surprised your project seems to only work with the query string approach. In any case, I’m glad you found that … and again, thanks for sharing the info!

To Ricky:

To send variables out, you’ll want the LoadVars class in AS2 and the Loader class in AS3.

Here are the 3 var I had to change:

In the AC_FL_RunContent script:

‘movie’, ‘gallery?menuName=xml/MenuAng.xml&pictureName=xml/Pictures.xml’,

In the param tag:

and in the embed tag:

src=”gallery.swf?menuName=xml/MenuAng.xml&pictureName=xml/Pictures.xml”

Hope this might help other people!

Haha, you’re welcome! Glad I could help.