pls find the police ?
pls trouver la police ?

Impact  Suggested by TheTanookiLink 

The font is named Impact.

impact is black

so make it white and outline it?

I do not know, I thus do not speak English I do not understand your sentence

how to make to have interior white of the letters and to keep a black cutting ? pls

It's impact in white then put black outline. I think you can do this with photoshop or ms word

Fontdu57 you posted in the wrong forum. Your question is about how to work with fonts, not about fonts as such. Apart from that, it is always useful to understand the programs you are using, so that you would not have to ask questions like this.