[NumLock]

Код:

uses
  IdMultipartFormData,
...
var
  MultiPartFormDataStream: TIdMultiPartFormDataStream;
begin
  MultiPartFormDataStream:=TIdMultiPartFormDataStream.Create;
  try
    MultiPartFormDataStream.AddFile('userfile[]', 'd:\Downloads\Service.jpg', 'image/jpeg');
    MultiPartFormDataStream.AddFormField('type', 'direct');
    MultiPartFormDataStream.AddFormField('private', '0');
    Memo1.Text:=IdHTTP1.Post('http://www.afroimages.org/upload.php', MultiPartFormDataStream);
    Memo1.Lines.SaveToFile('d:\Downloads\Response.htm');
  finally
    MultiPartFormDataStream.Free;
  end;
end;