<xsl:value-of select="aspdnsf:AddtoCartForm(ProductID, VariantID, 0, 'left')" disable-output-escaping="yes" />
means the formatting of the block with the "add to cart" button is contolled in the dll? Can any formatting be done without source code?
This is the same for printing orders, too, that the formatting is in the source code and any changes to the formatting would require a recompile?