Does anybody know how to pass string arrays to a C DLL procedure in VB?

codes are in the following:

C declare:

int __stdcall foo(int argc, char **argv);

VB code:

Declare Function foo Lib "myDll.dll" _
        (Byval argc as integer, argv as any) as integer

Dim argv(4) as string
....
rc = foo(argc, argv(0))

This does not work!

Please help

Yan