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Question : The StringStripWS function contains the statement, Flag : $STR_STRIPALL (8) = strip all spaces (over-rides all other flags) In the German forum @Professor_Bernd wrote me, that this is an incorrect description. A test we made revealed, that it seems to be exactly the other way around. $STR_STRIPALL gets overwritten by all other flags. Example : #include <StringConstants.au3> Local $sOriginal = " A sentence with whitespace. " , $sOutput ConsoleWrite(" -------------------------------------------------------------------------------------" & @CRLF) ConsoleWrite("+ Original : <" & $sOriginal & ">" & @CRLF) ConsoleWrite(" -------------------------------------------------------------------------------------" & @CRLF) $sOutput = StringFormat("%-40s", StringStripWS($sOriginal, $STR_STRIPLEADING) & ">") ConsoleWrite("> >>>>>>> 1. <" & $sOutput & "==> STRIPLEADING" & @CRLF) $sOutput = StringFormat("%-40s", StringStripWS($sOriginal, $STR_STRIPTRAILING) & ">") ConsoleWrite("> >>>>>>> 2. <" & $sOutput & "==> STRIPTRAILING" & @CRLF) $sOutput = StringFormat("%-40s", StringStripWS($sOriginal, $STR_STRIPSPACES) & ">") ConsoleWrite("> >>>>>>> 3. <" & $sOutput & "==> STRIPSPACES" & @CRLF) $sOutput = StringFormat("%-40s", StringStripWS($sOriginal, $STR_STRIPLEADING + $STR_STRIPTRAILING + $STR_STRIPSPACES) & ">") ConsoleWrite("> >>>>>>> 4. <" & $sOutput & "==> STRIPLEADING + STRIPTRAILING + STRIPSPACES" & @CRLF) $sOutput = StringFormat("%-40s", StringStripWS($sOriginal, $STR_STRIPALL) & ">") ConsoleWrite("> >>>>>>> 5. <" & $sOutput & "==> STRIPALL" & @CRLF) ConsoleWrite(" -------------------------------------------------------------------------------------" & @CRLF) $sOutput = StringFormat("%-40s", StringStripWS($sOriginal, $STR_STRIPALL + $STR_STRIPLEADING) & ">") ConsoleWrite("! >>>>>>> 6. <" & $sOutput & "==> STRIPALL + STRIPLEADING" & @CRLF) $sOutput = StringFormat("%-40s", StringStripWS($sOriginal, $STR_STRIPALL + $STR_STRIPTRAILING) & ">") ConsoleWrite("! >>>>>>> 7. <" & $sOutput & "==> STRIPALL + STRIPTRAILING" & @CRLF) $sOutput = StringFormat("%-40s", StringStripWS($sOriginal, $STR_STRIPALL + $STR_STRIPSPACES) & ">") ConsoleWrite("! >>>>>>> 8. <" & $sOutput & "==> STRIPALL + $STR_STRIPSPACES" & @CRLF) $sOutput = StringFormat("%-40s", StringStripWS($sOriginal, $STR_STRIPALL + $STR_STRIPLEADING + $STR_STRIPTRAILING + $STR_STRIPSPACES) & ">") ConsoleWrite("! >>>>>>> 9. <" & $sOutput & "==> STRIPALL + STRIPLEADING + STRIPTRAILING + STRIPSPACES" & @CRLF) ConsoleWrite(" -------------------------------------------------------------------------------------" & @CRLF) Is this behavior already known, or have we possibly misunderstood something. Any clarification is welcome. TIA @Musashi and @Professor_Bernd