If you call your warning.skin it is like any other skins which will show the background you've selected.
A menu .skin is never fully transparent, it will always show your background image in it.
I think that I have found .
I have replaced my EXIT commande by SENDMSG;ElcosMenu;Exit :
Code:"RADAR_FIXE_30","SETVOL;WINAMP;255||RUN;$SKINPATH$ElcosMenu.exe|RRRADAR.SKIN||SAY;ATTENTION RADAR - TRENTE KILOMAITRE HEURE||SETVOL;WINAMP;40||SETLABEL;!WARNING1;30||SETLABEL;!WARNING1;30||WAIT;3||SENDMSG;ElcosMenu;Exit"
Do you think that my command is ok because sometime I have an error : -1
I think that I have a font size problem and I don't know why
You'll have to ask EC about that.
IIRC, label support was iffy. Since you're just using a fixed label code, you can also just make it part of the image.
Pico-ITX / XP Home with EWF-HORM / RR v12/02/2009 / Winamp v5.13 / RRMedia v1.2.2