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//declare the DLL import functions [DllImport("netapi32
//Coded by Eugene E. Zhukovsky, 8.21.2002
//declare the DLL import functions
[DllImport("mpr.dll", CharSet=CharSet.Auto)]
public static extern int WNetEnumResource(
IntPtr hEnum,
ref int lpcCount,
IntPtr lpBuffer,
ref int lpBufferSize );
[DllImport("mpr.dll", CharSet=CharSet.Auto)]
public static extern int WNetOpenEnum(
RESOURCE_SCOPE dwScope,
RESOURCE_TYPE dwType,
RESOURCE_USAGE dwUsage,
[MarshalAs(UnmanagedType.AsAny)][In] Object lpNetResource,
out IntPtr lphEnum);
[DllImport("mpr.dll", CharSet=CharSet.Auto)]
public static extern int WNetCloseEnum( IntPtr hEnum );
//declare the structures to hold info
public enum RESOURCE_SCOPE
{
RESOURCE_CONNECTED = 0x00000001,
RESOURCE_GLOBALNET = 0x00000002,
RESOURCE_REMEMBERED = 0x00000003,
RESOURCE_RECENT= 0x00000004,
RESOURCE_CONTEXT= 0x00000005
}
public enum RESOURCE_TYPE
{
RESOURCETYPE_ANY= 0x00000000,
RESOURCETYPE_DISK= 0x00000001,
RESOURCETYPE_PRINT = 0x00000002,
RESOURCETYPE_RESERVED = 0x00000008,
}
public enum RESOURCE_USAGE
{
RESOURCEUSAGE_CONNECTABLE =0x00000001,
RESOURCEUSAGE_CONTAINER=0x00000002,
RESOURCEUSAGE_NOLOCALDEVICE =0x00000004,
RESOURCEUSAGE_SIBLING=0x00000008,
RESOURCEUSAGE_ATTACHED=0x00000010,
RESOURCEUSAGE_ALL =(RESOURCEUSAGE_CONNECTABLE | RESOURCEUSAGE_CONTAINER | RESOURCEUSAGE_ATTACHED),
}
public enum RESOURCE_DISPLAYTYPE
{
RESOURCEDISPLAYTYPE_GENERIC= 0x00000000,
RESOURCEDISPLAYTYPE_DOMAIN= 0x00000001,
RESOURCEDISPLAYTYPE_SERVER= 0x00000002,
RESOURCEDISPLAYTYPE_SHARE= 0x00000003,
RESOURCEDISPLAYTYPE_FILE = 0x00000004,
RESOURCEDISPLAYTYPE_GROUP= 0x00000005,
RESOURCEDISPLAYTYPE_NETWORK= 0x00000006,
RESOURCEDISPLAYTYPE_ROOT = 0x00000007,
RESOURCEDISPLAYTYPE_SHAREADMIN = 0x00000008,
RESOURCEDISPLAYTYPE_DIRECTORY = 0x00000009,
RESOURCEDISPLAYTYPE_TREE = 0x0000000A,
RESOURCEDISPLAYTYPE_NDSCONTAINER = 0x0000000B
}
public struct NETRESOURCE
{
public RESOURCE_SCOPE dwScope;
public RESOURCE_TYPE dwType;
public RESOURCE_DISPLAYTYPE dwDisplayType;
public RESOURCE_USAGE dwUsage;
[MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPTStr)] public string lpLocalName;
[MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPTStr)] public string lpRemoteName;
[MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPTStr)] public string lpComment;
[MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPTStr)] public string lpProvider;
}
//the function we'll be calling
public static void WNETOE(Object o)
{
int iRet;
IntPtr ptrHandle = new IntPtr();
try
{
iRet =WNetOpenEnum(
RESOURCE_SCOPE.RESOURCE_GLOBALNET,
RESOURCE_TYPE.RESOURCETYPE_ANY,
RESOURCE_USAGE.RESOURCEUSAGE_ALL,
o,
out ptrHandle );
if( iRet != 0 )
{
return;
}
int entries;
int buffer = 16384;
IntPtr ptrBuffer = Marshal.AllocHGlobal( buffer );
NETRESOURCE nr;
for(;;)
{
entries = -1;
buffer = 16384;
iRet =WNetEnumResource( ptrHandle, ref entries, ptrBuffer, ref buffer );
if( (iRet != 0) || (entries < 1) )
{
break;
}
Int32 ptr = ptrBuffer.ToInt32();
for( int i = 0; i < entries; i++ )
{
nr = (NETRESOURCE)Marshal.PtrToStructure( new IntPtr(ptr), typeof(NETRESOURCE) );
if(RESOURCE_USAGE.RESOURCEUSAGE_CONTAINER == (nr.dwUsage
& RESOURCE_USAGE.RESOURCEUSAGE_CONTAINER))
{
//call recursively to get all entries in a container
WNETOE(nr);
}
ptr += Marshal.SizeOf( nr );
Console.WriteLine( " {0} : LocalName='{1}' RemoteName='{2}'",
nr.dwDisplayType.ToString(), nr.lpLocalName, nr.lpRemoteName );
}
}
Marshal.FreeHGlobal( ptrBuffer );
iRet =WNetCloseEnum( ptrHandle );
}
catch(Exception e)
{
}
}
//now call the function passing a null
WNETOE(null);
//here's some possible error codes
public enum NERR
{
NERR_Success = 0, /* Success */
ERROR_MORE_DATA = 234, // dderror
ERROR_NO_BROWSER_SERVERS_FOUND = 6118,
ERROR_INVALID_LEVEL = 124,
ERROR_ACCESS_DENIED = 5,
ERROR_INVALID_PARAMETER = 87,
ERROR_NOT_ENOUGH_MEMORY = 8,
ERROR_NETWORK_BUSY = 54,
ERROR_BAD_NETPATH = 53,
ERROR_NO_NETWORK = 1222,
ERROR_INVALID_HANDLE_STATE = 1609,
ERROR_EXTENDED_ERROR= 1208
}
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