Functions to convert VFP cursors and arrays to C style arrays and vice versa.

MarshalCArray2CursorConverts a C array into a VFP cursor.
MarshalCArray2FoxArrayConverts a C array into a VFP array.
MarshalCursor2CArrayConverts a VFP cursor into a C array.
MarshalFoxArray2CArrayConverts a VFP array into a C array.