Passing parameters dynamically to the Merlin component

All,

How can I pass dynamically the parameters to a Merlin component.
Suppose my stand alone client instantiates the Merlin component
and now calls a method which takes in parameters.
As of now, I saw the Parameterization tutorial and there the parameters
are specified and even their values are hard coded in the block.xml file.
How can I get the values of the parameters dynamically and not specify them
in the block.xml?

Regards,
Harvinder