in Contains the domain controller enumeration context handle provided by the DsGetDcOpen function.

        iReturn = DsGetDcOpen("domain1.mydomains.com", 1, "MYADSITE", (System.IntPtr)null, null, 0, out pDcContext);

internal static extern DWORD DsGetDcOpen(

[DllImport("Netapi32.dll", EntryPoint = "DsGetDcOpenW", CallingConvention = CallingConvention.StdCall, CharSet = CharSet.Unicode)]

internal static extern int DsGetDcOpen(

Declare Function DsGetDcOpen Lib "netapi32.dll" (TODO) As TODO

    iReturn = DsGetDcOpen("domain1.mydomains.com", 0, null, (System.IntPtr)null, null, 0, out pDcContext);

    iReturn = DsGetDcOpen("domain1.mydomains.com", 1, "MYADSITE", (System.IntPtr)null, null, 0, out pDcContext);