[Qt] QT WebKit how to use in Lazarus?

[aime two]

Hello,
I would like to migrate an application from Delphi to Lazarus, to 
distribute it under MacOSX, Linux and Zindozs.
I think that having to use the WebKit QT4.
But how to integrate this in a "panel", a "TabSheet"?
Developer untrained amateur to the Object Language, I am in difficulty 
to achieve this.
Thank you in advance to those who could help me in guiding me, giving me 
a small program that does this and can I serve as an example.

Best regards.

Sorry for the translation (I'm French)