DosGetCollate

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

#define INCL_DOSNLS

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

USHORT           Length;        /* Length of data area provided */
PCOUNTRYCODE     Structure;     /* Input data structure */
PCHAR            MemoryBuffer;  /* Collate table (returned) */
PUSHORT          DataLength;    /* Length of collate table (returned) */

USHORT           rc;            /* return code */

Example 

This example gets a collating sequence table for codepage 850 and the 
current country. 

#define INCL_DOSNLS

#define CURRENT_COUNTRY 0
#define NLS_CODEPAGE 850

COUNTRYCODE Country;
CHAR        CollBuffer[256];
USHORT      Length;
USHORT      rc;

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

   rc = DosGetCollate(sizeof(CollBuffer),   /* Length of data area
                                                provided */
                      &Country,             /* Input data structure */
                      CollBuffer,           /* Data area to contain collate
                                                table */
                      &Length);             /* Length of table */