All is working fine here, exit and fullscreen, the frontend use commandline for that : value=""%path\%file%ext" -gen -auto -fullscreen
;---------------------------------
; Fusion Configuration File
;---------------------------------
;---------------------------------
; Graphics Compatibility Options
;---------------------------------
ForceCompatibleGFX=0
CompatibleGFXOpt=0
EnhancedGFXOpt=0
ForceFullScreen32=0
VistaAeroIgnore=0
VistaNoWndVSync=1
DebugFlags=0,0,2,2
;---------------------------------
; Sound Compatibility Options
;---------------------------------
ForceSWBuffer=1
;---------------------------------
; SG1000/SC3000/SMS/GG Specific
;---------------------------------
LastSMSROM=F:\emulateur\Sega\mastersystem\rom\Asterix (E).sms
LastGGROM=F:\emulateur\sega\kega2\
SMSUSABIOS=
SMSJAPBIOS=
SMSEURBIOS=
GGBIOS=
SF7000IPL=
SxMFiles=F:\emulateur\sega\kega\divers
SMSStateFiles=F:\emulateur\sega\kega\etat
SMSPatchFiles=F:\emulateur\sega\kega\patch
GGPatchFiles=F:\emulateur\sega\kega\patch
SMSSpriteLimitDisable=1
YM2413Disable=0
SMSBIOSDisable=0
SMSBorderDisable=0
GameGearZoom=0
GameGearFull=0
;---------------------------------
; MegaDrive/Genesis Specific
;---------------------------------
LastGenesisROM=F:\emulateur\Sega\Megadrive\rom\Aero the Acro-Bat (U) [c][!].zip
SRMFiles=F:\emulateur\sega\kega\divers
StateFiles=F:\emulateur\sega\kega\etat
PatchFiles=F:\emulateur\sega\kega\patch
GenesisBIOS=
AutoChecksums=0
GenBorderDisable=0
;---------------------------------
; Mega CD/Sega CD Specific
;---------------------------------
LastSegaCDImage=F:\emulateur\sega\megaCD\rom\Soul Star\Soul Star.cue
SCDUSABIOS=F:\emulateur\sega\megaCD\bios\us_scd2_9306.bin
SCDJAPBIOS=F:\emulateur\sega\megaCD\bios\jp_mcd1_9112.bin
SCDEURBIOS=F:\emulateur\sega\megaCD\bios\eu_mcd2_9306.bin
SCDStateFiles=F:\emulateur\sega\kega\etat
DefaultDrive=X:X:X None
CDReadAhead=4
CD+GMode=0
ForceASPI=0
BRMFiles=F:\emulateur\sega\kega\brm
BRMPerGame=1
LEDEnabled=1
PerfectSync=1
;---------------------------------
; 32X Specific
;---------------------------------
32XM68KBIOS=F:\emulateur\sega\megaCD\bios\32X_G_BIOS.BIN
32XMSH2BIOS=F:\emulateur\sega\megaCD\bios\32X_M_BIOS.BIN
32XSSH2BIOS=F:\emulateur\sega\megaCD\bios\32X_S_BIOS.BIN
Disable32X=0
Fast32XTiming=0
;---------------------------------
; Expert Options [DANGER! RTFM!]
;---------------------------------
RefreshRate60Hz=60
RefreshRate50Hz=100
UseExpertModes=0
UseAutoSwitching=0
MinSwitchDelay=100
Mode256x240=640,480,60,100,640,480
Mode256x480=640,480,60,100,640,480
Mode320x240=640,480,60,100,640,480
Mode320x480=640,480,60,100,640,480
;---------------------------------
; File History
;---------------------------------
FileHistory0=F:\emulateur\sega\mastersystem\rom\Alex Kidd in Miracle World 2 (F).sms
FileHistory1=F:\emulateur\sega\Megadrive\rom\Alex Kidd in the Enchanted Castle (E) [!].zip
FileHistory2=F:\emulateur\sega\Megadrive\rom\Akumajou Dracula - Vampire Killer (J).zip
FileHistory3=F:\emulateur\sega\mastersystem\rom\Solomon no Kagi - Oujo Rihita no Namida (J).sms
FileHistory4=F:\emulateur\sega\mastersystem\rom\Star Wars (UE).sms
FileHistory5=F:\emulateur\sega\mastersystem\rom\Spider-Man - Return of the Sinister Six (E).sms
FileHistory6=F:\emulateur\sega\mastersystem\rom\Spellcaster (F).sms
FileHistory7=F:\emulateur\sega\mastersystem\rom\Spacegun (E).sms
FileHistory8=F:\emulateur\sega\mastersystem\rom\Space Harrier (UE).sms
FileHistory9=F:\emulateur\sega\mastersystem\rom\Aleste (W).sms
FileHistoryA=F:\emulateur\sega\mastersystem\rom\Asterix and the Secret Mission (E).sms
FileHistoryB=F:\emulateur\sega\mastersystem\rom\Asterix (E).sms
FileHistoryC=F:\emulateur\sega\Megadrive\rom\Wonder Library (J) [!].zip
FileHistoryD=F:\emulateur\sega\Megadrive\rom\World Championship Soccer (JU) (REV 03) [!].zip
FileHistoryE=F:\emulateur\sega\mastersystem\rom\Action Fighter (UE).sms
FileHistoryF=F:\emulateur\sega\megaCD\rom\Dungeon Explorer\Dungeon Explorer.cue
ShortenHistoryNames=0
;---------------------------------
; Netplay Settings
;---------------------------------
NetplayName=
NetplayServer=
NetplayPlayers=2
NetplayLatency=6
NetplayBandwidth=1
;---------------------------------
; General Settings
;---------------------------------
WAVFilesPath=F:\emulateur\sega\kega2\*.wav
VGMFilesPath=F:\emulateur\sega\kega2\*.vgm
AVIFilesPath=F:\emulateur\sega\kega2\*.avi
ScreenshotPath=F:\emulateur\sega\kega\divers
ScreenshotType=0
ScreenshotMode=1
CurrentCountry=0
CountryAutoDetect=1
CountryOrder=0
CurrentWaveFormat=1
SoundOverdrive=0
PSGNoiseBoost=0
SoundSuperHQ=0
SoundDisabled=0
SoundFilter=0
CurrentRenderMode=1
FullScreen=0
DWindowXPos=88,0,0,0
DWindowYPos=116,0,0,0
DWindowSize=224,1,128,2
DResolution=224,1,128,2
DRenderMode=0
DFixedAspect=1
DFixedZoom=0
DFiltered=1
DNTSCAspect=0
DNearestMultiple=0
DScanlines=4
VSyncEnabled=0
Player1Keys=0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
Player1bKeys=0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
Player1cKeys=0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
Player1dKeys=0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
Player2Keys=72,80,75,77,36,37,38,157,49,50,51,52,0,0,0,0
Player2bKeys=0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
Player2cKeys=0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
Player2dKeys=0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
Player1Buttons=50,51,48,49,2,1,0,7,4,5,36,6,8,9,10,11
Player1bButtons=32,33,34,35,0,1,2,3,4,5,6,7,8,9,10,11
Player1cButtons=32,33,34,35,0,1,2,3,4,5,6,7,8,9,10,11
Player1dButtons=32,33,34,35,0,1,2,3,4,5,6,7,8,9,10,11
Player2Buttons=32,33,34,35,0,1,2,3,4,5,6,7,8,9,10,11
Player2bButtons=32,33,34,35,0,1,2,3,4,5,6,7,8,9,10,11
Player2cButtons=32,33,34,35,0,1,2,3,4,5,6,7,8,9,10,11
Player2dButtons=32,33,34,35,0,1,2,3,4,5,6,7,8,9,10,11
Joystick1Type=1
Joystick1bType=1
Joystick1cType=1
Joystick1dType=1
Joystick2Type=1
Joystick2bType=1
Joystick2cType=1
Joystick2dType=1
Joystick1Using=2
Joystick1bUsing=0
Joystick1cUsing=0
Joystick1dUsing=0
Joystick2Using=0
Joystick2bUsing=0
Joystick2cUsing=0
Joystick2dUsing=0
Player1MSKeys=0,0,0,0,0,0,0,0
Player2MSKeys=72,80,75,77,36,37,157,0
Player1MSButtons=50,51,48,49,2,1,7,0
Player2MSButtons=32,33,34,35,0,1,3,0
Joystick1MSType=1
Joystick2MSType=1
Joystick1MSUsing=2
Joystick2MSUsing=0
MultiTapType=0
InvertMouse=0
LightgunCursor=0
FPSEnabled=0
CurrentRenderPlugin=0
AllowSleeping=0
AlternateTiming=0
DisableShortcuts=0
ThreadPriority=0
StaticDisabled=0
Brighten=0
CartBootEnabled=0
VGM_Version=16,1
MSNStatusEnabled=0