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• SaveScreen([<nTop>], [<nLeft>], [<nBottom>], [<nRight>]) -> cScreen
  saves portion or entire screen.

• Scroll([<nTop>], [<nLeft>], [<nBottom>], [<nRight>], [<nVert>], [<nHoriz>]) -> NIL
  scrolls portion or entire screen.

• Seconds() -> nSeconds.hundredths.
  returns the system time as a numeric value in the form sssss.ff (range: 0.00 - 86399.99), which number is in fact, the number of seconds elapsed since midnight, based on a twenty-four hour clock.

• Secs( <cTime> ) -> nSeconds
  converts <cTime> to seconds (integer). For empty or invalid <cTime> returns 0.

• Select([<cAlias>]) -> nWorkArea
  returns nWorkArea occupied by given <cAlias>. If no <cAlias> is given, the currently selected work area number is returned or 1 if none selected. If a non-existent or invalid <cAlias> is given, returns 0 zero.

• Set(<nSpecifier>, [<expNewSetting>], [<lOpenMode>]) -> lCurrentSetting
  returns <nSpecifier> setting and optionally changes it. Refer to set.ch header file for available settings.

• SetBlink([<lToggle>]) -> lCurrentSetting
  toggles blink state by changes the meaning of the asterisk (*) in a color string. When .T. blinking is on, when .F. background intensity is on. (Default=.T.)

• SetCancel([<lToggle>]) -> lCurrentSetting

• SetColor([<cColorString>]) -> cCurrentColor

• SetCursor([<nCursorShape>]) -> nCurrentSetting

• SetKey(<nInkeyCode>, [<bAction>]) -> bCurrentAction

• SetMode(<nRows>, <nCols>) -> lSuccess

• SetPos(<nRow>, <nCol>) -> NIL

• SetPrc(<nRow>, <nCol>) -> NIL

• SoundEx(<cString>) -> cSoundExString
  converts <cString> to a four-character code used to find similar-sounding words or names. The first character of the code is the first character of <cString> and the rest three are coded numbers. Vowels are ignored unless they are the first letter of the string. It's possibly useful function to search for sound-alike english words. Does NOT support characters with codes above 127 in ASCII table.

• Space( <nNumber> ) -> cSpaceChars
  returns a string that contains nNumber space character(s) (ASCII character 32).

• Sqrt( <nNumber> ) -> nSquareRoot
  returns the square root of <nNumber>. The precision of this evaluation is based solely on the settings of the SET DECIMAL TO command. Any negative number passed as <nNumber> will always return a 0.

• StoD( [<cDate>] ) -> dDate
  converts a date string to date value formatted as yyyymmdd.

• Str(<nNumber>, [<nLength>], [<nDecimals>]) -> cNumber
  converts a numeric expression <nNumber> to a character string.
  <nLength> is the length of the character string to return, including decimal digits, decimal point, and sign. <nDecimals> is the number of decimal places to return.

• StrTran(<cString>, <cFindString>, [<cReplaceWith>], [<nStart>], [<nOccurences>]) -> cNewString
  it searches into <cString> for any occurrence of <cFindString>, and replaces it with <cReplaceWith>. If <cRepLaceWith> is not specified, a NULL byte will replace the <cFindString> or in other words the <cFindString> will be removed. <nStart> is the starting occurrence to be replaced (default is 1st occurence). <nOccurrences> is the number of occurrences to be replaced (default is all occurences).

• StrZero( <nNumber>, [<nLength>], [<nDecimals>] ) -> cNumber
  converts a numeric expression <nNumber> to a character string, padded with leading zero(s).
  <nNumber> is the numeric expression to be converted to a character string. <nLength> is the length of the character string to return, including decimal digits, decimal point, and sign. <nDecimals> is the number of decimal places to return.

• Stuff(<cString>, <nStart>, <nDelete>, <cInsert>) -> cNewString
  inserts and/or deletes characters in a string. Basically, inserts <cInsert> character(s) at position <nPos> and concurrently deletes <nDelete> character(s) starting from <nStart> and beyond. Evidently, if <nDelete is 0 no character is deleted. Likewise if <cInsert> is null string "", nothing is inserted.

• SubStr(<cString>, <nStart>, [<nCount>]) -> cSubstring
  returns a sub-string extracted from the string <cString>. <nStart> is the position of <cString> from which it'll start. <nCount> is the number of characters to be returned and if not given, all characters from <nStart> up to the end of <cString> will be returned.