unit u_send;

interface

uses
 Classes, Windows, SysUtils, StrUtils, DateUtils,
 IdBaseComponent, IdComponent, IdTCPConnection, IdTCPClient, IdFTP, IniFiles;

type
 TThreadSend = class(TThread)
 private
   { Private declarations }
 protected
   procedure Execute; override;
 end;

var
 FTP: TIdFTP;

implementation

uses
 Main;

{ Important: Methods and properties of objects in visual components can only be
 used in a method called using Synchronize, for example,

     Synchronize(UpdateCaption);

 and UpdateCaption could look like,

   procedure TThreadSend.UpdateCaption;
   begin
     Form1.Caption := 'Updated in a thread';
   end; }

{ TThreadSend }

procedure TThreadSend.Execute;

var
 SearchRec: TSearchRec;
 FindResult: Integer;

 ClientCode: string;
 FTPLogin: string;

 HomeDir: string;

begin
 { Place thread code here }

 FTP:=TIdFTP.Create(nil);
 try
   FTP.Host:='**.**.**.***';
   FTP.Username:='********';
   FTP.Password:='********';
   FTP.Passive:=true;
   while not Terminated do begin
     {для каждого клиента делать } begin
       FindResult := FindFirst(BCDir + '\MAILBOX\' + ClientCode + '\POSTIN\*.*', faAnyFile, SearchRec);
       while FindResult = 0 do  begin
         with SearchRec do
           begin
             if (Name <> '.') and (Name <> '..') then
               if not (Attr and faDirectory <> 0)
                 then begin
                   if not(FTP.Connected) then
                     try
                       FTP.Connect;
                       HomeDir:=FTP.RetrieveCurrentDir;
                     except
                       FTP.Disconnect;
                     end;
                   if FTP.Connected then
                     try
                       FTP.ChangeDir(HomeDir + '/' + FTPLogin + '/MBOX/RT');
                       FTP.Put(BCDir + '\MAILBOX\' + ClientCode + '\POSTIN\' + Name, Name);
                       if FTP.Size(Name) = Size then begin
                         FTP.Rename(Name, '../R/' + Name);
                         DeleteFile(BCDir + '\MAILBOX\' + ClientCode + '\POSTIN\' + Name);
                       end;
                     except
                       FTP.Disconnect;
                     end;
                 end;
             FindResult:= FindNext(SearchRec);
           end;
       end;
       FindClose(SearchRec);
     end;
     FTP.Disconnect;
     Sleep(15000);
   end;
 finally
   FTP.Disconnect;
   FTP.Free;
 end;
end;
end.

unit u_send;

interface

uses
 Classes, Windows, SysUtils, StrUtils, DateUtils,
 IdBaseComponent, IdComponent, IdTCPConnection, IdTCPClient, IdFTP, IniFiles;

type
 TThreadSend = class(TThread)
 private
   { Private declarations }
 protected
   procedure Execute; override;

 end;

var

implementation

uses
 Main;

{ TThreadSend }
type
 PFileNotifyInformation = ^TFileNotifyInformation;
 TFileNotifyInformation = packed record
   NextEntryOffset: DWORD;
   Action: DWORD;
   FileNameLength:DWORD;
   FileName: WideChar;
 end;

procedure TThreadSend.Execute;

var
 FTP: TIdFTP;

 SearchRec: TSearchRec;
 FindResult: Integer;

 ClientCode: string;
 FTPLogin: string;

 HomeDir: string;
 hDir: THandle;

 lpBuf: Pointer;
 lpOverlapped: POverlapped;

begin
 { Place thread code here }
 FreeOnTerminate:=false;
 hDir := CreateFile ( 'c:\test', GENERIC_READ, FILE_SHARE_READ, nil, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS or FILE_FLAG_OVERLAPPED, 0);
 if hDir <> INVALID_HANDLE_VALUE then begin
   GetMem(lpBuf, 64*1204);
   GetMem(lpOverlapped, SizeOf(lpOverlapped));
   try
     ZeroMemory(lpBuf, SizeOf(lpBuf));
     ReadDirectoryChangesW(hDir, lpBuf, SizeOf(lpBuf), true, FILE_NOTIFY_CHANGE_FILE_NAME, nil, lpOverlapped, nil);
   finally
     FreeMem(lpBuf); FreeMem(lpOverlapped);
   end;

 end;
end;
end.

type
 OnDirectoryChange = procedure(Sender: TObject);  // Зачем нужен sender сам еще не знаю, но пускай бубет :)
...

procwdure OnDirectoryChange((Sender: TObject);
begin
// делать что-то при обнаружении нового файла, а точнее шмальнуть его...

end;