function TForm1.EmptyDirectory(TheDirectory:String;Recursive:Boolean):Boolean;
var
SearchRec : TSearchRec;
Res : Integer;
begin
Res := FindFirst(TheDirectory + '*.*', faAnyFile, SearchRec);
try
while Res = 0 do
begin
if (SearchRec.Name <> '.') and (SearchRec.Name <> '..') then
begin
if ((SearchRec.Attr and faDirectory) > 0) and Recursive then
begin
EmptyDirectory(TheDirectory + SearchRec.Name, True);
RemoveDirectory(PChar(TheDirectory + SearchRec.Name));
end
else
begin
DeleteFile(PChar(TheDirectory + SearchRec.Name))
end;
end;
Res := FindNext(SearchRec);
end;
Result := True;
finally
FindClose(SearchRec);
end;
end;





procedure TForm1.Button3Click(Sender: TObject);
begin
if EmptyDirectory('C:\aa\',True) then
showmessage('文件夹已清空');
end;