/All Show all available drives/devices (instead removable only)
/Lang: Manual select interface language
/NoWMI Use old (1.12.1 and below) method to list physical devices
/NoScroll Do not scroll log if it exceeds 64KB limit
/Access: Preselect "Access type" (see hints on radio buttons)
/Action: Preselect "Action type" (see hints on radio buttons)
/Pattern: Preselect test type for "Write and read test" (see hints
on radio buttons)
/Delayed: Preselect pattern for delayed write/read test (see
"Pattern" combobox for available values)
/File:"" Set file name for "Save image" or "Load image" single pass
/TestLen: Preselect "Test length" (see hints on radio buttons)
/TestCount: Set value for "Manual" test count
/Sure Supress warnings about destructive operations
/Start:"" Start process immediate for specified drive or device
("" is a first charachters in the drop-down list of
selected access type: "C" or "D:" or "E:\" for temporary
file or logical drive access; "0" or "1:" or "2:\" for
physical device access type). If no drive or device will
found, error message displayed and no any process started
/Quit Close program after successfull operation (affected only
with "/Start")

Examples:

ChkFlsh.exe /Access:1 /Action:1 /Pattern:3 /Delayed:AA /Sure /Start:"Z:\"
Selects "As logical drive" access type, "Write and read
test" with "Write pattern" option and "AA" pattern selected,
supress warning about erasing data during test and start
process with these options for drive "Z:\"

ChkFlsh.exe /Access:2 /Action:3 /File:"C:\image.img" /Start:"4:\" /Quit
Stores full image of device number 4 into file C:\image.img
and exit after successfull operation

ChkFlsh.exe /TestLen:3
Select by default "Until first error found" test length and
wait for any other user input