SET "ExpAdvRegKey=HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced"
::Get Current Size
FOR /F "tokens=3" %%v IN ('REG QUERY "%ExpAdvRegKey%" /v "TaskbarSmallIcons"') DO SET "CSIZE=%%v"
::Bitwise XOR Toggles Size
SET /A NSIZE=%CSIZE% ^^ 1
::Set New Size
REG add "%ExpAdvRegKey%" /v "TaskbarSmallIcons" /t "REG_DWORD" /d "%NSIZE%" /f
::Update TraySettings
winapiexec64.exe u@SendMessageW 0xffff 0x001a 0 "TraySettings"
::PAUSE