Re: [DOTNET] .NET and using APIs

[Mattias Sjögren]

Simon,

Try it like this:

[DllImport("netapi32.dll", CharSet=CharSet.Unicode)]
static extern int NetWkstaUserEnum(
   string servername,
   int level,
   out IntPtr bufptr,
   int prefmaxlen,
   out int entriesread,
   out int totalentries,
   ref int resume_handle);


[DllImport("netapi32.dll")]
static extern int NetApiBufferFree(
   IntPtr Buffer);

// for use on Win NT/2000 only
[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Unicode)]
public struct WKSTA_USER_INFO_0
{
   public string wkui0_username;
}

[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Unicode)]
public struct WKSTA_USER_INFO_1
{
   public string wkui1_username;
   public string wkui1_logon_domain;
   public string wkui1_oth_domains;
   public string wkui1_logon_server;
}

// ...

IntPtr bufptr = IntPtr.Zero;
int dwEntriesread;
int dwTotalentries = 0;
int dwResumehandle = 0;
int nStatus;
Type tWui1 = typeof(WKSTA_USER_INFO_1);
int nStructSize = Marshal.SizeOf( tWui1 );
WKSTA_USER_INFO_1 wui1;

this.listView1.Items.Clear();

do
{
   nStatus = NetWkstaUserEnum(
     textBox1.Text,
     1,
     out bufptr,
     MAX_PREFERRED_LENGTH,
     out dwEntriesread,
     out dwTotalentries,
     ref dwResumehandle );

   //
   // If the call succeeds,
   //
   if ((nStatus == NERR_SUCCESS) | (nStatus == ERROR_MORE_DATA))
   {
     if (dwEntriesread > 0)
     {
       IntPtr pstruct = bufptr;

       //
       // Loop through the entries.
       //
       for (int i = 0; i < dwEntriesread; i++)
       {
         wui1 = (WKSTA_USER_INFO_1)Marshal.PtrToStructure( pstruct, tWui1 );
         MessageBox.Show(wui1.wkui1_username);
         pstruct = (IntPtr)((int)pstruct + nStructSize);
       }
     }
     else
     {
       MessageBox.Show("A system error has occurred : " + nStatus);
     }
   }

   if ( bufptr != IntPtr.Zero )
     NetApiBufferFree( bufptr );

} while(nStatus == ERROR_MORE_DATA);


>If anyone can help or point me in the direction of a good book it would be
>much appreciated.

".NET and COM: The Complete Interoperability Guide" by Adam Nathan, ISDN 
067232170X.



Mattias

===
Mattias Sjögren
[EMAIL PROTECTED]

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