>Thanks for advise ,
>But it's not working for me.
>I didn't mention , but I think , the real problem is that in VB method parameters declared with type specification Double, Integer e.t.c .At the same time VB recognized passed data from VFP as Variant type and raising DataType Error.
>Does somebodey has any other idea?

Then check Ed Rauh's (rest in peace my friend) code (probably in downloads - serach for SafeArray).
Cetin