:initProgress max format -- initializes an internal progress counter and display the progress in percent
::                       -- max    [in]     - progress counter maximum, equal to 100 percent
::                       -- format [in,opt] - title string formatter, default is '[P] completed.'
set /a "ProgressCnt=-1"
set /a "ProgressMax=%~1"
set "ProgressFormat=%~2"
if not defined ProgressFormat set "ProgressFormat=[PPPP]"
set "ProgressFormat=%ProgressFormat:[PPPP]=[P] completed.%"
call:doProgress
EXIT /b