Re: difference between

[Jussi Lahtinen <jussi.lahtinen@xxxxxxxxx>]

But this is much better:
If IsNull(PictureBoxQRCode.Image) = False Then


Jussi


On Sat, Oct 10, 2026 at 3:33 PM Jussi Lahtinen <jussi.lahtinen@xxxxxxxxx>
wrote:

> Avoid extra "Not", it makes reading the code confusing.
> You can fix it this way:
>
> If Not (PictureBoxQRCode.Image = Null) Then.
>
>
> Jussi
>
>
> On Sat, Oct 10, 2026 at 9:43 AM valaquarus <valaquarus@xxxxxxxxx> wrote:
>
>> Hello,
>> what are the differences between these two assertions, because they don't
>> act exactly the same way :
>>
>> - If Not PictureBoxQRCode.Image = Null Then...
>> - If Not IsNull(PictureBoxQRCode.Image) Then...
>>
>>
>> [System]
>> Gambas=3.22.99 2992226 (master)
>> OperatingSystem=Linux
>> Distribution=Manjaro Linux
>> Kernel=7.2.3-2-MANJARO
>> Architecture=x86_64
>> Cores=4
>> Memory=5713M
>> Language=fr_FR.UTF-8
>> Platform=x11
>> Desktop=KDE
>> DesktopResolution=96
>> DesktopScale=9
>> WidgetTheme=breeze
>> Font=Adwaita Mono,12
>> DarkTheme=False
>> [Programs]
>> appimage-builder=appimage-builder: 1.1.1.dev32+g2709a3b
>> clang=clang version 22.1.8
>> dpkg=Programme « dpkg » de gestion de paquets Debian version 1.23.7-dirty
>> (amd64).
>> gcc=gcc (GCC) 16.2.1 20260810
>> git=git version 2.55.0
>> msgmerge=msgmerge (GNU gettext-tools) 1.0
>> pngquant=3.0.3
>> rpmbuild=RPM version 6.0.1
>> trans=Translate Shell 0.9.7.1-git:dc67af4
>> [Libraries]
>> Cairo=libcairo.so.2.11804.4
>> Curl=libcurl.so.4.8.0
>> DBus=libdbus-1.so.3.38.3
>> GDK2=libgdk-x11-2.0.so.0.2400.33
>> GDK3=libgdk-3.so.0.2420.32
>> GStreamer=libgstreamer-1.0.so.0.2806.0
>> GTK+2=libgtk-x11-2.0.so.0.2400.33
>> GTK+3=libgtk-3.so.0.2420.32
>> OpenGL=libGL.so.1.7.0
>> Poppler=libpoppler.so.163.0.0
>> QT5=libQt5Core.so.5.15.19
>> QT6=libQt6Core.so.6.11.2
>> RSvg=librsvg-2.so.2.62.3
>> SDL=libSDL2-2.0.so.0.3200.72
>> SQLite3=libsqlite3.so.3.53.4
>> [Environment]
>> DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus
>> DEBUGINFOD_URLS=https://debuginfod.archlinux.org
>> DESKTOP_SESSION=/usr/share/xsessions/plasmax11.desktop
>> DISPLAY=:0
>> DOCKER_HOST=unix:///run/user/1000/podman/podman.sock
>> GB_GUI=gb.gtk3
>>
>> GTK2_RC_FILES=/etc/gtk-2.0/gtkrc:<home>/.gtkrc-2.0:<home>/.config/gtkrc-2.0
>> GTK_MODULES=canberra-gtk-module
>> GTK_RC_FILES=/etc/gtk/gtkrc:<home>/.gtkrc:<home>/.config/gtkrc
>> HOME=<home>
>> ICEAUTHORITY=/run/user/1000/iceauth_IlqFFb
>> INVOCATION_ID=41b15739ce1c46eb9a1566475fbf9362
>> JOURNAL_STREAM=10:13404
>> KDE_APPLICATIONS_AS_SCOPE=1
>> KDE_FULL_SESSION=true
>> KDE_SESSION_UID=1000
>> KDE_SESSION_VERSION=6
>> LANG=fr_FR.UTF-8
>> LANGUAGE=fr_FR.UTF-8
>> LOGNAME=<user>
>> MAIL=/var/spool/mail/<user>
>> MANAGERPID=826
>> MANAGERPIDFDID=8436
>>
>> MEMORY_PRESSURE_WATCH=/sys/fs/cgroup/user.slice/user-1000.slice/user@1000.service
>> /session.slice/plasma-plasmashell.service/memory.pressure
>> MEMORY_PRESSURE_WRITE=c29tZSAyMDAwMDAgMjAwMDAwMAA=
>> MOTD_SHOWN=pam
>> OLDPWD=<home>
>> PAM_KWALLET5_LOGIN=/run/user/1000/kwallet5.socket
>>
>> PATH=<home>/.local/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/var/lib/flatpak/exports/bin:/usr/lib/jvm/default/bin:/usr/bin/site_perl:/usr/bin/vendor_perl:/usr/bin/core_perl:/usr/lib/rustup/bin
>> PWD=<home>
>> QT_LINUX_ACCESSIBILITY_ALWAYS_ON=1
>> QT_LOGGING_RULES=*.debug=false
>> QT_QPA_PLATFORM=xcb
>>
>> QT_SCREEN_SCALE_FACTORS=LVDS-1=1;VGA-1=1;HDMI-1=1;DP-1=1;HDMI-2=1;HDMI-3=1;DP-2=1;DP-3=1;
>> QT_WAYLAND_RECONNECT=1
>>
>> SESSION_MANAGER=local/<hostname>:@/tmp/.ICE-unix/969,unix/<hostname>:/tmp/.ICE-unix/969
>> SHELL=/usr/bin/zsh
>> SYSTEMD_EXEC_PID=981
>> TZ=:/etc/localtime
>> USER=<user>
>> VSSCRIPT_PATH=/usr/lib/python3.14/site-packages/vapoursynth/libvsscript.so
>> XAUTHORITY=/run/user/1000/xauth_cjAxZJ
>>
>> XDG_CONFIG_DIRS=<home>/.config/kdedefaults:/etc/xdg:/usr/share/manjaro-kde-settings/xdg
>> XDG_CURRENT_DESKTOP=KDE
>>
>> XDG_DATA_DIRS=<home>/.local/share/flatpak/exports/share:/var/lib/flatpak/exports/share:/usr/local/share:/usr/share
>> XDG_MENU_PREFIX=plasma-
>> XDG_RUNTIME_DIR=/run/user/1000
>> XDG_SEAT=seat0
>> XDG_SEAT_PATH=/org/freedesktop/DisplayManager/Seat0
>> XDG_SESSION_CLASS=user
>> XDG_SESSION_DESKTOP=KDE
>> XDG_SESSION_ID=2
>> XDG_SESSION_PATH=/org/freedesktop/DisplayManager/Session1
>> XDG_SESSION_TYPE=x11
>> XDG_VTNR=2
>>
>>
>> Good day to all of you
>>
>> --
>>
>> valaquarus <valaquarus@xxxxxxxxx>
>>
>