Local $aSize = _DirGetSizeEx(@SystemDir, "*.exe;*.dll", 1)

ConsoleWrite("Size :" & $aSize[0] & @CRLF)
ConsoleWrite("Files count :" & $aSize[1]  & @CRLF)
ConsoleWrite("Folders count  :" & $aSize[2] & @CRLF)


; #FUNCTION#====================================================================================================================
; Name ..........: _DirGetSizeEx ; Description ...: Returns the size in bytes of a file list by extension.
; Syntax ........: _DirGetSizeEx($sDir[, $sMask = "*"[, $iFlag = 0]])
; Parameters ....: $sDir                - The directory to search in.
;                  $sMask               - [optional] Filter for results. Default is "*" (all).
;                                         Filter for result. Multiple filters must be separated by ";"
;                                         Use "|" to separate 3 possible sets of filters: "Include|Exclude|Exclude_Folders"
;                                             Include = Files/Folders to include (default = "*" [all])
;                                             Exclude = Files/Folders to exclude (default = "" [none])
;                                             Exclude_Folders = only used if $iRecur = 1 AND $iReturn <> 2 to exclude defined folders (default = "" [none])
;                  $iFlag               - [optional] 0 (default) = Returns the size
;                                                    1 = Extended mode is On -> returns an array that contains extended information (see Remarks).
;                                                    2 = Don't get the size of files in subdirectories (recursive mode is Off) ; Return values .: Success = The size in bytes, or a single dimension array
;                  Failure = -1 and sets the @error flag to 1 if the path doesn't exist.
; Author ........: jguinch
; Remarks .......: If you use the extended mode then the array returned from this function is a single dimension array containing the followingelements:
;                    $aArray[0] = Size
;                    $aArray[1] = Files count
;                    $aArray[2] = Dirs Count
;===============================================================================================================================
Func _DirGetSizeEx($sDir, $sMask = "*", $iFlag = 0); OK
    If NOT FileExists($sDir) Then Return SetError(1, 0, -1)
    If NOT StringInStr(FileGetAttrib($sDir), "D") Then Return SetError(1, 0, -1)

    Local $iExtMode = BitAND($iFlag, 1) > 0
    Local $iRecMode = NOT BitAND($iFlag, 2) > 0
    Local $aDirs[1] = [ StringRegExpReplace($sDir, "\\$", "") ]
    Local $iCountDir = 0, $iCountFile = 0, $n = 0, $iSize = 0
    Local $hSearch, $sFileName, $sRegexFilesInclude, $sRegexFilesExclude = "^$", $sRegexFoldersExclude = "^$"

    Local $sRegexMask = StringReplace( StringReplace( StringReplace($sMask, "|", "\|") , "?", "\E(?:.|.?$)\Q"), "*", "\E.*?\Q")
    Local $aFilters = StringSplit($sRegexMask, "\|", 3)

    $sRegexFilesInclude = "(?i)^(?:" & StringRegExpReplace(StringReplace($aFilters[0], ";", "|") , "([^|]+)", "\\Q$1\\E") & ")$"
    If UBound($aFilters) > 1 Then $sRegexFilesExclude = "(?i)^(?:" & StringRegExpReplace(StringReplace($aFilters[1], ";", "|") , "([^|]+)", "\\Q$1\\E") & ")$"
    If UBound($aFilters) > 2 Then $sRegexFoldersExclude = "(?i)^(?:" & StringRegExpReplace(StringReplace($aFilters[2], ";", "|") , "([^|]+)", "\\Q$1\\E") & ")$"

    While 1
        $hSearch = FileFindFirstFile( $aDirs[$n]  & "\*.*"  )
        If $hSearch <> -1 Then

            While 1
                $sFileName = FileFindNextFile($hSearch)
                If @error Then ExitLoop

                If @Extended Then
                    If NOT StringRegExp($sFileName, $sRegexFoldersExclude) Then
                        $iCountDir += 1
                        If $iCountDir >= UBound($aDirs) Then Redim $aDirs[UBound($aDirs) * 2]
                        $aDirs[$iCountDir] = $aDirs[$n] & "\" & $sFileName
                    EndIf
                Else
                    If StringRegExp($sFileName, $sRegexFilesInclude) AND NOT StringRegExp($sFileName, $sRegexFilesExclude) Then
                        $iSize += FileGetSize($aDirs[$n] &  "\" &$sFileName)
                        $iCountFile += 1
                    EndIf
                EndIf
            WEnd

            If NOT $iRecMode Then ExitLoop
        EndIf

        FileClose($hSearch)

        If $n = $iCountDir Then ExitLoop
        $n += 1
    WEnd

    If NOT $iExtMode Then Return $iSize

    Local $aResult[3] = [ $iSize, $iCountFile, $iCountDir ]
    Return $aResult
EndFunc