Nachricht an Computer im Netzwerk senden

[Larsi]

Hi,

ich habe folgenden Code aus dem SwissDelphiCenter gefunden:

Delphi-Quellcode:

function NetSend(dest, Source, Msg: string): Longint; overload;
type
  TNetMessageBufferSendFunction = function(servername, msgname, fromname: PWideChar;
    buf: PWideChar; buflen: Cardinal): Longint; 
  stdcall;
var
  NetMessageBufferSend: TNetMessageBufferSendFunction;
  SourceWideChar: PWideChar;
  DestWideChar: PWideChar;
  MessagetextWideChar: PWideChar;
  Handle: THandle;
begin
  Handle := LoadLibrary('NETAPI32.DLL');
  if Handle = 0 then
  begin
    Result := GetLastError;
    Exit;
  end;
    @NetMessageBufferSend := GetProcAddress(Handle, 'NetMessageBufferSend');
  if @NetMessageBufferSend = nil then
  begin
    Result := GetLastError;
    Exit;
  end;

  MessagetextWideChar := nil;
  SourceWideChar      := nil;
  DestWideChar        := nil;

  try
    GetMem(MessagetextWideChar, Length(Msg) * SizeOf(WideChar) + 1);
    GetMem(DestWideChar, 20 * SizeOf(WideChar) + 1);
    StringToWideChar(Msg, MessagetextWideChar, Length(Msg) * SizeOf(WideChar) + 1);
    StringToWideChar(Dest, DestWideChar, 20 * SizeOf(WideChar) + 1);

    if Source = '' then
      Result := NetMessageBufferSend(nil, DestWideChar, nil,
        MessagetextWideChar, Length(Msg) * SizeOf(WideChar) + 1)
    else
    begin
      GetMem(SourceWideChar, 20 * SizeOf(WideChar) + 1);
      StringToWideChar(Source, SourceWideChar, 20 * SizeOf(WideChar) + 1);
      Result := NetMessageBufferSend(nil, DestWideChar, SourceWideChar,
        MessagetextWideChar, Length(Msg) * SizeOf(WideChar) + 1);
      FreeMem(SourceWideChar);
    end;
  finally
    FreeMem(MessagetextWideChar);
    FreeLibrary(Handle);
  end;
end;

function NetSend(Dest, Msg: string): Longint; overload;
begin
  Result := NetSend(Dest, '', Msg);
end;

function NetSend(Msg: string): Longint; overload;
begin
  Result := NetSend('', '', Msg);
end;

// Example:

procedure TForm1.Button1Click(Sender: TObject);
const
  NERR_BASE = 2100;
  NERR_NameNotFound = NERR_BASE + 173;
  NERR_NetworkError = NERR_BASE + 36;
  NERR_Success = 0;
var
  Res: Longint;
  sMsg: string;
begin
  Res := NetSend('LoginName', 'Your Message...');
  case Res of
    ERROR_ACCESS_DENIED: sMsg := 'user does not have access to the requested information.';
    ERROR_INVALID_PARAMETER: sMsg := 'The specified parameter is invalid.';
    ERROR_NOT_SUPPORTED: sMsg := 'This network request is not supported.';
    NERR_NameNotFound: sMsg := 'The user name could not be found.';
    NERR_NetworkError: sMsg := 'A general failure occurred in the network hardware.';
    NERR_Success: sMsg := 'Message sent!';
  end;
  ShowMessage(sMsg);
end;

Ich möchte die Nachricht an einen Computer im Netzwerk senden. Geht das damit? Also wenn ich dort wo jetzt 'LoginName' steht, den Computernamen meines Rechners eingebe kommt die dritte Fehlermeldung. Oder gibt's ne Möglichkeit den angemeldeten User auf einem anderem Computer im Netzwerk auszulesen?