Function GetTempDir(): String;
Var
Lng: DWORD;
Begin
SetLength(Result, MAX_PATH);
Lng:= GetTempPath(MAX_PATH, PChar(Result));
SetLength(Result, Lng);
end;
Kullanım Şekli
procedure TForm1.Button1Click(Sender: TObject);
begin
label1.caption := GetTempDir;
end;