DosGetCtryInfo

typedef struct _COUNTRYCODE {   /* ctryc */
 
  USHORT country;               /* country code */
  USHORT codepage;              /* code page */
 
} COUNTRYCODE;

typedef struct _COUNTRYINFO {   /* ctryi */
 
  USHORT country;                   /* country code */
  USHORT codepage;                  /* code page */
  USHORT fsDateFmt;                 /* date format */
  CHAR   szCurrency[5];             /* currency indicator */
  CHAR   szThousandsSeparator[2];   /* thousands separator */
  CHAR   szDecimal[2];              /* decimal separator *  /
  CHAR   szDateSeparator[2];        /* date separator */
  CHAR   szTimeSeparator[2];        /* time separator */
  UCHAR  fsCurrencyFmt;             /* bit fields for currency format */
  UCHAR  cDecimalPlace;             /* currency decimal places */
  UCHAR  fsTimeFmt;                 /* Time format (AM/PM or 24 hr) */
  USHORT abReserved1[2];            /* reserved (0) */
  CHAR   szDataSeparator[2];        /* Data list separator */
  USHORT abReserved2[5];            /* reserved (0) */
 
} COUNTRYINFO;

#define INCL_DOSNLS

USHORT  rc = DosGetCtryInfo(Length, Structure, MemoryBuffer, DataLength);

USHORT           Length;        /* Length of data area provided */
PCOUNTRYCODE     Structure;     /* Input data structure */
PCOUNTRYINFO     MemoryBuffer;  /* Country information (returned) */
PUSHORT          DataLength;    /* Length of data (returned) */

USHORT           rc;            /* return code */

Example 

This example gets country-dependent information. 

#define INCL_DOSNLS

#define CURRENT_COUNTRY 0
#define NLS_CODEPAGE 850

COUNTRYCODE Country;
COUNTRYINFO CtryBuffer;
USHORT      Length;
USHORT      rc;

   Country.country = CURRENT_COUNTRY;
   Country.codepage = NLS_CODEPAGE;

   rc = DosGetCtryInfo(sizeof(CtryBuffer),       /* Length of data area
                                                     provided */
                       &Country,                 /* Input data structure */
                       &CtryBuffer,              /* Data area to be filled
                                                         by function */
                       &Length);                 /* Length of data
                                                         returned */