Batch conditionals
From wikinotes
if statement
IF [%VARIABLE%]==[] (
echo Variable is not set
) ELSE IF [%VARIABLE]==[blah](
echo some condition
) ELSE (
echo Value Found
)
IF [%VARIABLE%]==[] (
echo Variable is not set
) ELSE IF [%VARIABLE]==[blah](
echo some condition
) ELSE (
echo Value Found
)