Marshalling DSOP_INIT_INFO in .net 2.0

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Hello, I'm using .Net 2.0 and I'm trying to use the IDSObjectPicker to show
the Active Directory picker. I'm not sure I'm marshalling the DSOP_INIT_INFO
struct correctly. I get this error (which pretty much could mean anything):
The parameter is incorrect. (Exception from HRESULT: 0x80070057
(E_INVALIDARG))

This is the code:

DSOP_SCOPE_INIT_INFO[] scopes = new DSOP_SCOPE_INIT_INFO[1];

DSOP_SCOPE_INIT_INFO scope = new DSOP_SCOPE_INIT_INFO();

scope.cbSize = (uint)Marshal.SizeOf(typeof(DSOP_SCOPE_INIT_INFO));

scope.flType = (uint)DsopScopeInfoTypes.DSOP_SCOPE_TYPE_TARGET_COMPUTER;

scope.flScope =
(uint)DsopScopeInfoScopes.DSOP_SCOPE_FLAG_WANT_PROVIDER_LDAP;

scope.FilterFlags.flDownlevel =
(uint)(DsopFilter.DSOP_DOWNLEVEL_FILTER_USERS |
DsopFilter.DSOP_DOWNLEVEL_FILTER_GLOBAL_GROUPS);

scope.FilterFlags.Uplevel.flBothModes =
(uint)DsopUplevelFilter.DSOP_FILTER_USERS;

scope.FilterFlags.Uplevel.flMixedModeOnly = 0;

scope.FilterFlags.Uplevel.flNativeModeOnly = 0;

scope.pwzADsPath = null;

scope.pwzDcName = null;

scope.hr = 0;

scopes[0] = scope;

// DSOP_INIT_INFO

DSOP_INIT_INFO initInfo = new DSOP_INIT_INFO();

initInfo.cbSize = (uint)Marshal.SizeOf(typeof(DSOP_INIT_INFO));

initInfo.pwzTargetComputer = _targetComputer;

initInfo.flOptions = _options;

initInfo.cAttributesToFetch = 0;

initInfo.apwzAttributeNames = IntPtr.Zero;

initInfo.cDsScopeInfos = (uint)scopes.Length;

initInfo.aDsScopeInfos = scopes;

Type objectPickerType =
Type.GetTypeFromCLSID(NativeMethods.CLSID_DsObjectPicker, true);

object pickerObj = Activator.CreateInstance(objectPickerType);

_picker = (IDSObjectPicker)pickerObj;

And the declaration of the structs:

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]

internal struct DSOP_INIT_INFO

{



public uint cbSize;

[MarshalAs(UnmanagedType.LPWStr)]

public string pwzTargetComputer;

public uint cDsScopeInfos;

public DSOP_SCOPE_INIT_INFO[] aDsScopeInfos;

public uint flOptions;

public uint cAttributesToFetch;

public IntPtr apwzAttributeNames;

}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto), Serializable]

internal struct DSOP_SCOPE_INIT_INFO

{



public uint cbSize;

public uint flType;

public uint flScope;

[MarshalAs(UnmanagedType.Struct)]

public DSOP_FILTER_FLAGS FilterFlags;

[MarshalAs(UnmanagedType.LPWStr)]

public string pwzDcName;

[MarshalAs(UnmanagedType.LPWStr)]

public string pwzADsPath;

public uint hr;

}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]

internal struct DSOP_UPLEVEL_FILTER_FLAGS

{

public uint flBothModes;

public uint flMixedModeOnly;

public uint flNativeModeOnly;

}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]

internal struct DSOP_FILTER_FLAGS

{

public DSOP_UPLEVEL_FILTER_FLAGS Uplevel;

public uint flDownlevel;

}



Could anyone give me a hint?

Cheers,
Chris


.

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