Marshalling in C#.......Please Help

[Guest]

Below is a certain function in c++.....
OTMSTATUS OTMAPI Otm_CreateSnapShotW(
IN pOpenTransactionInW In,
IN ULONG NumVolumes,
IN PVOID InVolumeMap,
IN ULONG *VolumeMapFlags,
IN ULONG OutVolumeMapByteSize,
INOUT PVOID OutVolumeMap,
OUT pOpenTransactionOutW Out,
OUT pSnapShot *SnapShot
INOUT LPOVERLAPPED Overlapped,
IN LPOVERLAPPED_COMPLETION_ROUTINE CompletionRoutine
);


How would i PInvoke it so taht I can use it in C#?
INOUT PVOID OutVolumeMap is the output given by the function and it is in
the form of a string array.How would I define OutVolumeMap so that it would
give me the right result??

Thanks and Regards
MVB

 

[Sijin Joseph]

You will need to use the MarshalAsAttribute

[MarshalAs(UnmanagedType.LPArray,Out)] string[] OutVolumeMap

Reference:
http://msdn.microsoft.com/library/d...ry/en-us/vcmex/html/vcgrfmarshalingarrays.asp
http://support.microsoft.com/default.aspx?scid=kb;EN-US;305990

Sijin Joseph
http://www.indiangeek.net
http://weblogs.asp.net/sjoseph