How to pass PVOID* to native code from managed code - DOTNET

Hi,

I need to call a native windows method which has the following
signature

BOOL SomeMethod(PVOID* value);

value [out] - The original value.

I am calling this method using DllImport and am passing in an IntPtr.

Intptr val = IntPtr.Zero;
bool status = SomeMethod(val);

but this results in the method returning failure and GetLastError
gives me error code 1. (ERROR_INVALID_FUNCTION)

I suspect that this is because I am not passing in the correct data
type from the managed code.
What managed datatype should I use for a PVOID* ?

Thanks,
Roshan