Negative Lookbehind works in "GREP search" but not in "GREP style"

[Juanxoxoxo]

Hello ! I love Indesign for its extended functionnalities but its quirks may sometimes drive me crazyish. I've looked for answers for a few hours now and I'd better take a rest.

I'd like to apply a GREP style to the first paragraph of a text only. I made this formula and it works fine in the GREP search tool : 

(?<!\r)^.+?$

However it does not work properly when I apply this formula to the GREP style "text" box.

Did I do something wrong ? Thanks !

[Colin Flashman · Accepted solution]

GREP searches and GREP styles are similar but not the same. A GREP style works within a passage of type until it gets to the end of a line ($) and then starts again in the next line, but the GREP search is able to look at entire passages without being concerned about end of lines.