Author: Jonas Bilinkevicius

Is there an API function which gives all the subdirectories and all the files of 
one particular directory (in order to save a whole directory for example )?

Answer:

You can copy a whole directory with one instruction using the ShFileOperation API 
function:

1   procedure TForm1.Button2Click(Sender: TObject);
2   var
3     OpStruc: TSHFileOpStruct;
4     frombuf, tobuf: array[0..128] of Char;
5   begin
6     FillChar(frombuf, Sizeof(frombuf), 0);
7     FillChar(tobuf, Sizeof(tobuf), 0);
8     StrPCopy(frombuf, 'd:\brief\*.*');
9     StrPCopy(tobuf, 'd:\temp\brief');
10    with OpStruc do
11    begin
12      Wnd := Handle;
13      wFunc := FO_COPY;
14      pFrom := @frombuf;
15      pTo := @tobuf;
16      fFlags := FOF_NOCONFIRMATION or FOF_RENAMEONCOLLISION;
17      fAnyOperationsAborted := False;
18      hNameMappings := nil;
19      lpszProgressTitle := nil;
20    end;
21    ShFileOperation(OpStruc);
22  end;


If you need a list of all files and subdirs you have to do a recursive scan using FindFirst/ FindNext.