RE:*** Borrar Carpetas ***
Chequea esto, fue lo que pude encontrar, para documentarte más con relación a todo lo de win32 en delphi, ve a inicio/programs/borland delphi/ms sdk help files/Win32 programming.... Ahí tienes algo de ayuda. Espero que te sirva.
-----------------------------EJEMPLO CON DELETE FILE------------------------------
if FileExists(FileName) then
if MessageDlg('Do you really want to delete ' + ExtractFileName(FileName) + '?'), mtConfirmation, [mbYes, mbNo], 0, mbNo) = IDYes then
DeleteFile(FileName);
--------------------------------------------DOCUMENTACIÓN--------------------------
BOOL DeleteFile(
LPCTSTR lpFileName // pointer to name of file to delete
);
Parameters
lpFileName
Points to a null-terminated string that specifies the file to be deleted.
Return Values
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. To get extended error information, call GetLastError.
Remarks
If an application attempts to delete a file that does not exist, the DeleteFile function fails.
Windows 95: The DeleteFile function deletes a file even if it is open for normal I/O or as a memory-mapped file. To prevent loss of data, close files before attempting to delete them.
Windows NT: The DeleteFile function fails if an application attempts to delete a file that is open for normal I/O or as a memory-mapped file.
To close an open file, use the CloseHandle function.