I'm inside a cfloop over a query. I want to get an attribute, but I won't know what that attribute will be until runtime. Using #qryResult[MyAttr]# fails with the error "Complex object types cannot be converted to simple values." What is the syntax for doing this?

Here is a simplified example:

<cfquery datasource="TestSource" name="qryResult">
    SELECT * FROM MyTable
</cfquery>

<cfloop query="qryResult">
    <cfset MyAttr="autoid" />
    <cfoutput>
        Test 1: #qryResult.autoid# <br/>  <!--- succeeds --->
        Test 2: #qryResult[MyAttr]# <br/> <!--- fails --->
    </cfoutput>
</cfloop>