How do I get the country code

Posted on 2009-04-08
Last Modified: 2013-11-23
Windows defines these constants: CTRY_AUSTRALIA, CTRY_AUSTRIA, CTRY_BELGIUM, etc.  The GetLocaleInfo returns strings for local configurations.  I have looked around and everyone uses GetLocaleInfo to obtain string values.

Which function should I call to get the CTRY_AUSTRALIA, CTRY_AUSTRIA, CTRY_BELGIUM constants?

Question by:rambolivia
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LVL 86

Accepted Solution

jkr earned 150 total points
ID: 24099097
You can get that valus (as a string, though) by calling 'GetLocaleInfo()' and requesting LOCALE_ICOUNTRY - here's a small C sample that demonstrates this:
#include <windows.h>
#include <stdio.h>
void main () {
  char buf[255];

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LVL 39

Assisted Solution

itsmeandnobodyelse earned 100 total points
ID: 24099133
>>>> Which function should I call to get the CTRY_AUSTRALIA

Hmm. These are 'region codes' which were used for phone numbers to these countries.

You can find your region code in the registry at

   HKEY_CURRENT_USER\Control Panel\International  

in the Value 'iCountry'.

I doubt that there is an official API for it. In MSDN I found only functions of 'Commerce Server 2002'  which retrieve that value - what ever that is.

But by calling RegQueryValue you surely can get it.

LVL 39

Expert Comment

ID: 24099161
>>>> I doubt that there is an official API for it.

jkr knows better ;-)
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LVL 39

Expert Comment

ID: 24099209
>>>> Which function should I call to get the CTRY_AUSTRALIA, CTRY_AUSTRIA, CTRY_BELGIUM constants?

You would get the 61 == CTRY_AUSTRALIA as string value.

To get the name 'Australia' you probably would need LOCALE_SCOUNTRY as input constant.
LVL 19

Expert Comment

ID: 24099445
These constants are defined in Winnls.h , include Window.h to get their values as in the code snippet below.

You might however be actually looking for what jkr specified above, the "Language Identifiers and Locales" might be useful if you need to explicitly set the locale. Also check out "Local Information Constants"

#include <iostream>
#include "Windows.h"
using namespace std;
int main()
  cout << "CTRY_AUSTRALIA\t" << CTRY_AUSTRALIA << endl;
  cout << "CTRY_AUSTRIA\t" << CTRY_AUSTRIA << endl;
  cout << "CTRY_BELGIUM\t" << CTRY_BELGIUM << endl;
  return 0;

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Author Closing Comment

ID: 31568070
The registry entries are good and valid even in Windows 64bits and Windows Vista.  The Delphi code I decided to use is:

procedure GetCurrentCountryInformation(out CountryCode: integer; out CountryName: string);
  ret: DWORD;
  info: DWORD;
  buff: Array[0..255] of  WideChar;
  CountryCode := 0;
  CountryName := '';

  ret := GetLocaleInfoW(LOCALE_SYSTEM_DEFAULT, LOCALE_ICOUNTRY, @buff, 256);

  if (ret = 0) then

  CountryCode := StrToInt(buff);

  ret := GetLocaleInfoW(LOCALE_SYSTEM_DEFAULT, LOCALE_SCOUNTRY, @buff, 256);

  if (ret = 0) then

  CountryName :=  buff;

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