:IsFileOpen

succeeds if file in use, fails otherwise

Description: call:IsFileOpen filename
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:IsFileOpen filename -- succeeds if file in use, fails otherwise
::                   -- filename [in] - name of file to be tested
:$created 20060101 :$changed 20080219 :$categories FileOperation
:$source https://www.dostips.com
echo.N|copy /-y NUL "%~1">NUL
EXIT /b