This example queries the the number of code pages and the first code page and language identifier from the file "SAMPLE.MSG". The result of the query has the format specified be the _MYCPINFO structure.

#define INCL_DOSMISC    /* Miscellaneous values */
#define INCL_DOSERRORS  /* DOS Error values */
#include <os2.h>
#include <stdio.h>

int main(VOID) {

typedef struct _MYCPINFO
 {  USHORT       cCP;          /* Number of code pages */
    USHORT       CP1;          /* First code page      */
    ULONG        dtype;
 } MYCPINFO;

UCHAR     uchBuffer[20] = {0};            /* Buffer for the returned list */
MYCPINFO  CPinfo         = {0};           /* Pointer to buffer */
ULONG     ulDataLen      = 0;             /* Length of data returned */
APIRET    rc             = NO_ERROR;      /* Return code */

 rc = DosQueryMessageCP( (PUCHAR) &CPinfo,
                         sizeof(MYCPINFO),
                         "SAMPLE.MSG",
                         &ulDataLen );

 if (rc != NO_ERROR) {
      printf("DosQueryMessageCP error: return code = %u\n", rc);
      return 1;
 } else {
      printf("SAMPLE.MSG:  %u Code Page(s) - Code Page 1 = %u.\n",
                                        CPinfo.cCP, CPinfo.CP1);
 } /* endif */

return NO_ERROR;
}