Hi
I'm trying to use the Replicaytion Management Functions in order to force a domain controller synchronization.
In my scenario I have more than one DC on which my application can create some users and groups and it need to wait for DC replication before it can proceed to use them in order to perform other operations (eg. set ACL). My solution is developed with .net framework 1.1 and Windows 2003 technologies.

In the my c# class library used to implement the DC synchronization I have two classes; the "ReplicationManagement" in which I have declared all the win32 function, structs and enumerations used and the "Domain" class with the "Synchronize" method.
In this method I use the "DsBind" and "DsGetDomainControllerInfo" to retrieve the list of domain controller and for each one is called the "DsReplicaSyncAll" function. This call returns the ERROR_INVALID_PARAMETER error (error code 87).
I suppose this error is returned because I make a mistake declaring the "DsReplicaSyncAll" (defined in the "ReplicationManagement" class).

Following the code I have wrote

ReplicationManagement.c
-----------------------------
[DllImport("ntdsapi.dll", SetLastError=true)
public static extern uint DsBind
 string DomainControllerName
 string DnsDomainName
 out IntPtr phD
 )

[DllImport("ntdsapi.dll", SetLastError=true)
public static extern uint DsGetDomainControllerInfo
 IntPtr hDs
 string DomainName
 uint InfoLevel
 out uint InfoCount
 out IntPtr pInf
 )

[DllImport("ntdsapi.dll", SetLastError=true)
public static extern uint DsReplicaSyncAll
 IntPtr hDS
 string szNameContext
 ulong uFlags
 FnCallBack pFnCallBack,  //BOOL (__stdcall * pFnCallBack) (LPVOID, PDS_REPSYNCALL_UPDATEW)
 out IntPtr pCallbackData
 out IntPtr pError
 )

Looking at the "DsReplicaSyncAll" I've wrote a delegate to implement a function pointer for the callback function. In the first version of the code I've tried to define the function with a IntPtr parameter and passing it the IntPtr.Zero value in the function call. Following the delegate declaration

public delegate bool FnCallBack(IntPtr pData, PDS_REPSYNCALL_UPDATE pUpdate)

where the REPSYNCALL_UPDATE is defined by the following struct

[StructLayout(LayoutKind.Sequential, Pack=1)
public struct PDS_REPSYNCALL_UPDAT

 public DS_REPSYNCALL_EVENT Event
 public IntPtr pErrInfo
 public IntPtr pSync

public enum DS_REPSYNCALL_EVENT : uin

 DS_REPSYNCALL_EVENT_ERROR = 0
 DS_REPSYNCALL_EVENT_SYNC_STARTED = 1
 DS_REPSYNCALL_EVENT_SYNC_COMPLETED = 2
 DS_REPSYNCALL_EVENT_FINISHED =

In the "Domain.cs" I use the ReplicationManagement.DsReplicaSyncAll as the following

IntPtr phDsDc = IntPtr.Zero
uint uResult = ReplicationManagement.DsBind("dc01", null, out phDsDc
if (uResult <> 0) {...
..
uResult = ReplicationManagement.DsReplicaSyncAll
 phDsDc,
 "DC=mydomain,DC=net",
 ReplicationManagement.DS_REPSYNCALL_ID_SERVERS_BY_DN
 new ReplicationManagement.FnCallBack( this.Callback )
 out pCallbackData
 out pError
 )
..

where the Callback is the following function

private bool Callback(IntPtr pData, ReplicationManagement.PDS_REPSYNCALL_UPDATE pUpdate

..

I need to understand if I use correctly the DsReplicaSyncAll in my c# code and how I can solve the problem.

Any help most appreciated