One of the wonderful new features of Delphi 3 (and later) is Code Insight, and especially the code-parameter expert (the hint that shows the parameters to the call you are typing in).

But one thing that I really hate of code insight is that it will come and go at will - and not my will.
Finaly I found the solution, simply press  SHIFT+CTRL+SPACE and "walla" it's there.