Getting AppConfig values

[ssgumby]

Lets say I have an appconfig Foo.ShipDiscount that has a number like 10. I want to get that value and test for it in the receipt xml package

<xsl:variable name="shipCouponAmount" select="number(receipt:EvalDecimal(aspdnsf:AppConfig('Foo.ShipDiscount'))" />

<xsl:if test="$shipCouponAmount > 0">
    do some cool stuff here
</xsl:if>

Obviously the above doesnt quite work, but what would work? How do I populate the variable from the appconfig and do it as a number?

Thanks

[George the Great]

Not sure what it's not working...looks pretty much spot on. For example, this works as expected

<xsl:variable name="vConfig" select="number(aspdnsf:AppConfig('NumAppConfig'))"/>
 
        <xsl:if test="$vConfig > 0">
          Greater than 0: <xsl:value-of select="$vConfig"/>
        </xsl:if>