C#

[StructLayout(LayoutKind.Sequential)]
private struct NETRESOURCE 
{ 
    public uint   dwScope; 
    public uint   dwType; 
    public uint   dwDisplayType; 
    public uint   dwUsage; 
    public string lpLocalName; 
    public string lpRemoteName; 
    public string lpComment; 
    public string lpProvider; 
};
<p>
[DllImport("Mpr.dll", EntryPoint="WNetEnumResourceW",
           SetLastError=true, CallingConvention=CallingConvention.Winapi)]
<p>
unsafe private static extern ErrorCodes WNetEnumResource(
           IntPtr hEnum, ref uint lpcCount, byte *buffer, ref uint lpBufferSize);
<p>
private unsafe void EnumerateServers()
{
    uint        bufferSize = 16384;
    byte        *buffer = (byte *) Marshal.AllocHGlobal((int) bufferSize);
    IntPtr      handle = (IntPtr) 0;
    ErrorCodes  result;
    uint        cEntries = 1;
<p>
    result = WNetOpenEnum(ResourceScope.RESOURCE_GLOBALNET, ResourceType.RESOURCETYPE_ANY, 0, 0, out handle);
<p>
    if (result == ErrorCodes.NO_ERROR)
    {
        aData.Add("WNetOpenEnum succeeded");
<p>
        do
        {
            result = WNetEnumResource(handle, ref cEntries, buffer, ref bufferSize);
<p>
            if (result == ErrorCodes.NO_ERROR)
            {
                NETRESOURCE *p = (NETRESOURCE *) buffer;
            }
            else if (result != ErrorCodes.ERROR_NO_MORE_ITEMS)
                break;
        } while (result != ErrorCodes.ERROR_NO_MORE_ITEMS);
    }
    else
        aData.Add("WNetOpenEnum failed");
<p>
     Marshal.FreeHGlobal((IntPtr) buffer);
}

public class BasicClass{...}
public class NewClass: BasicClass{...}

... 
Something(ref NewClass) // We call the method with a parameter
...

public BasicClass Something(ref BasicClass aclass)
{     
     // here I want to create an instance that is the same type as aclass is.
     return new aclass(); // This ofcourse won't work.
}