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Как получить информацию о локальных настройках системы

Delphi имеет функцию GetLocaleInfo, которая позволяет получать различную информацию о локальных настройках, таких как системный язык, символ валюты, количество десятичных знаков и т.д.

Далее приведена функция, которая возвращает значение в зависимости от параметра "flag":

........
function TForm1.GetLocaleInformation(Flag: Integer): String;
var
  pcLCA:    Array[0..20] of Char;
begin
  if( GetLocaleInfo(LOCALE_SYSTEM_DEFAULT,Flag,pcLCA,19) <= 0 ) then begin
    pcLCA[0] := #0;
  end;
  Result := pcLCA;
end;
........

Пример использования функции:

........
procedure TForm1.Button1Click(Sender: TObject);
begin
  ShowMessage(GetLocaleInformation(LOCALE_SENGLANGUAGE));
end;
........

"Flag" может содержать следующее значение (если посмотреть в Windows.pas):

  LOCALE_NOUSEROVERRIDE       { do not use user overrides }
  LOCALE_USE_CP_ACP           { use the system ACP }
  LOCALE_ILANGUAGE            { language id }
  LOCALE_SLANGUAGE            { localized name of language }
  LOCALE_SENGLANGUAGE         { English name of language
  LOCALE_SABBREVLANGNAME      { abbreviated language name }
  LOCALE_SNATIVELANGNAME      { native name of language }
  LOCALE_ICOUNTRY             { country code }
  LOCALE_SCOUNTRY             { localized name of country }
  LOCALE_SENGCOUNTRY          { English name of country }
  LOCALE_SABBREVCTRYNAME      { abbreviated country name }
  LOCALE_SNATIVECTRYNAME      { native name of country }
  LOCALE_IDEFAULTLANGUAGE     { default language id }
  LOCALE_IDEFAULTCOUNTRY      { default country code }
  LOCALE_IDEFAULTCODEPAGE     { default oem code page }
  LOCALE_IDEFAULTANSICODEPAGE { default ansi code page }
  LOCALE_IDEFAULTMACCODEPAGE  { default mac code page }
  LOCALE_SLIST                { list item separator }
  LOCALE_IMEASURE             { 0 = metric, 1 = US }
  LOCALE_SDECIMAL             { decimal separator }
  LOCALE_STHOUSAND            { thousand separator }
  LOCALE_SGROUPING            { digit grouping }
  LOCALE_IDIGITS              { number of fractional digits }
  LOCALE_ILZERO               { leading zeros for decimal }
  LOCALE_INEGNUMBER           { negative number mode }
  LOCALE_SNATIVEDIGITS        { native ascii 0-9 }
  LOCALE_SCURRENCY            { local monetary symbol }
  LOCALE_SINTLSYMBOL          { intl monetary symbol }
  LOCALE_SMONDECIMALSEP       { monetary decimal separator }
  LOCALE_SMONTHOUSANDSEP      { monetary thousand separator }
  LOCALE_SMONGROUPING         { monetary grouping }
  LOCALE_ICURRDIGITS          { # local monetary digits }
  LOCALE_IINTLCURRDIGITS      { # intl monetary digits }
  LOCALE_ICURRENCY            { positive currency mode }
  LOCALE_INEGCURR             { negative currency mode }
  LOCALE_SDATE                { date separator }
  LOCALE_STIME                { time separator }
  LOCALE_SSHORTDATE           { short date format string }
  LOCALE_SLONGDATE            { long date format string }
  LOCALE_STIMEFORMAT          { time format string }
  LOCALE_IDATE                { short date format ordering }
  LOCALE_ILDATE               { long date format ordering }
  LOCALE_ITIME                { time format specifier }
  LOCALE_ITIMEMARKPOSN        { time marker position }
  LOCALE_ICENTURY             { century format specifier (short date) }
  LOCALE_ITLZERO              { leading zeros in time field }
  LOCALE_IDAYLZERO            { leading zeros in day field (short date) }
  LOCALE_IMONLZERO            { leading zeros in month field (short date) }
  LOCALE_S1159                { AM designator }
  LOCALE_S2359                { PM designator }
  LOCALE_ICALENDARTYPE        { type of calendar specifier }
  LOCALE_IOPTIONALCALENDAR    { additional calendar types specifier }
  LOCALE_IFIRSTDAYOFWEEK      { first day of week specifier }
  LOCALE_IFIRSTWEEKOFYEAR     { first week of year specifier }
  LOCALE_SDAYNAME1            { long name for Monday }
  LOCALE_SDAYNAME2            { long name for Tuesday }
  LOCALE_SDAYNAME3            { long name for Wednesday }
  LOCALE_SDAYNAME4            { long name for Thursday }
  LOCALE_SDAYNAME5            { long name for Friday }
  LOCALE_SDAYNAME6            { long name for Saturday }
  LOCALE_SDAYNAME7            { long name for Sunday }
  LOCALE_SABBREVDAYNAME1      { abbreviated name for Monday }
  LOCALE_SABBREVDAYNAME2      { abbreviated name for Tuesday }
  LOCALE_SABBREVDAYNAME3      { abbreviated name for Wednesday }
  LOCALE_SABBREVDAYNAME4      { abbreviated name for Thursday }
  LOCALE_SABBREVDAYNAME5      { abbreviated name for Friday }
  LOCALE_SABBREVDAYNAME6      { abbreviated name for Saturday }
  LOCALE_SABBREVDAYNAME7      { abbreviated name for Sunday }
  LOCALE_SMONTHNAME1          { long name for January }
  LOCALE_SMONTHNAME2          { long name for February }
  LOCALE_SMONTHNAME3          { long name for March }
  LOCALE_SMONTHNAME4          { long name for April }
  LOCALE_SMONTHNAME5          { long name for May }
  LOCALE_SMONTHNAME6          { long name for June }
  LOCALE_SMONTHNAME7          { long name for July }
  LOCALE_SMONTHNAME8          { long name for August }
  LOCALE_SMONTHNAME9          { long name for September }
  LOCALE_SMONTHNAME10         { long name for October }
  LOCALE_SMONTHNAME11         { long name for November }
  LOCALE_SMONTHNAME12         { long name for December }
  LOCALE_SMONTHNAME13         { long name for 13th month (if exists) }
  LOCALE_SABBREVMONTHNAME1    { abbreviated name for January }
  LOCALE_SABBREVMONTHNAME2    { abbreviated name for February }
  LOCALE_SABBREVMONTHNAME3    { abbreviated name for March }
  LOCALE_SABBREVMONTHNAME4    { abbreviated name for April }
  LOCALE_SABBREVMONTHNAME5    { abbreviated name for May }
  LOCALE_SABBREVMONTHNAME6    { abbreviated name for June }
  LOCALE_SABBREVMONTHNAME7    { abbreviated name for July }
  LOCALE_SABBREVMONTHNAME8    { abbreviated name for August }
  LOCALE_SABBREVMONTHNAME9    { abbreviated name for September }
  LOCALE_SABBREVMONTHNAME10   { abbreviated name for October }
  LOCALE_SABBREVMONTHNAME11   { abbreviated name for November }
  LOCALE_SABBREVMONTHNAME12   { abbreviated name for December }
  LOCALE_SABBREVMONTHNAME13   { abbreviated name for 13th month (if exists) }
  LOCALE_SPOSITIVESIGN        { positive sign }
  LOCALE_SNEGATIVESIGN        { negative sign }
  LOCALE_IPOSSIGNPOSN         { positive sign position }
  LOCALE_INEGSIGNPOSN         { negative sign position }
  LOCALE_IPOSSYMPRECEDES      { mon sym precedes pos amt }
  LOCALE_IPOSSEPBYSPACE       { mon sym sep by space from pos amt }
  LOCALE_INEGSYMPRECEDES      { mon sym precedes neg amt }
  LOCALE_INEGSEPBYSPACE       { mon sym sep by space from neg amt }
  LOCALE_FONTSIGNATURE        { font signature }
  LOCALE_SISO639LANGNAME      { ISO abbreviated language name }
  LOCALE_SISO3166CTRYNAME     { ISO abbreviated country name }