About Lazarus

Lazarus it's an open source GUI RAD for Freepascal.
"Free Pascal (FPC) is an open-source Pascal compiler with two notable features: a high degree of Delphi compatibility and availability on a variety of platforms, including Windows, Mac OS X, and Linux. "
Links:
http://www.lazarus.freepascal.org/

In this links are daily snapshots:
http://www.hu.freepascal.org/lazarus/

Lazarus error: "duplicate identifier"

I was converting some code from Delphi to Lazarus and I find it this error: "duplicate identifier".
The solution was to put at the beginning of the unit the next piece of code:
{$code delphi}
{$h+}