Is it possible to use a variable as dlg_var key?

Hi List

I have this screnario:

$avp(media_type) = "audio";
$avp(media_type) = "video";
$avp(media_type) = "image";

while ($avp(media_type) != $null) {

	[doing some stuff I need to remember for the whole dialog]

	$dlg_var($avp(media_type)) = $var(result);
	pv_unset("$avp(media_type)");
}

xlog("L_INFO","Audio Media Type is $dlg_var(audio) \n");

=> NULL output, therefore $dlg_var(audio) was not set.

PS: I also attempted with quotes: 

$dlg_var("$avp(media_type)") = $var(result);

Mit freundlichen Grüssen

-Benoît Panizzon-
-- 
I m p r o W a r e   A G    -    Leiter Commerce Kunden
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