How to call function with variable arguments at runtime?

[Mr. Jonse]

I need to store a hetrogeneous array of delegates. How can I do 
this but still call the function with the appropriate number of 
parameters at run time?

I have the parameters as Variant[] params and a function/delegate 
pointer(void* for now).

Normally I'd push the parameters on the stack and use a call, but 
I'm sure D has some ability to do this, like apply(foo, args) 
would be the same as foo(args[0], ..., args[1]).

I'm not concerned about type correctness, it should always be 
consistent between what I call and what is stored.

Thanks.