how to et current file name and path

The path and filename of your program will be stored in the ParamStr(0) variable.

Whoops. Did I say variable? I meant function.

var FilePath,FileName:string;
...

FilePath:= ExtractFilePath(Application.ExeName);
FileName:= ExtractFileName(Application.ExeName);

Application.ExeName internally calls ParamStr(0), but it doesn't work with console apps (or wherever you don't have the TApplication object), so I'd rather follow Geoff's hint.
Windows automatically adds the path + filename of a launched app as the first parameter (ParamStr() is zero-based).

Markus

var FilePath,FileName:string;
...

FilePath:= ExtractFilePath(Application.ExeName);
FileName:= ExtractFileName(Application.ExeName);

or

//only for app not usage tapplication

FilePath:= ExtractFilePath(ParamStr(0));
FileName:= ExtractFileName(ParamStr(0));

:-D

Now that is b*stardisation if ever I saw it...

Geoff M.

Taken from Key Objects Library (KOL)

function GetStartDir : String;
var Buffer:array[0..260] of Char;
    I : Integer;
begin
  I := GetModuleFileName( 0, Buffer, Sizeof( Buffer ) );
  for I := I downto 0 do
    if Buffer[ I ] = '\' then
    begin
      Buffer[ I + 1 ] := #0;
      break;
    end;
  Result := Buffer;
end;