This example creates the new directory "TEMPPROG" in the root directory, access it, and then deletes it. Some return codes are not checked for brevity.

#define INCL_DOSFILEMGR   /* File Manager values */
#define INCL_DOSERRORS    /* DOS Error values    */
#include <os2.h>
#include <stdio.h>
#include <string.h>

int main(VOID) {
   UCHAR   achOrigDirName[256] = "";            /* Original directory name  */
   UCHAR   achNewDirName[256]  = "\\TEMPPROG";  /* New directory to create  */
   UCHAR   achDirName[256]     = "";          /* Directory name for queries */
   ULONG   cbDirPathLen    = 0;               /* Length of directory path   */
   PEAOP2  pEABuf       = NULL;   /* Extended Attribute buffer pointer      */
   ULONG   ulDriveNum   = 0;      /* Drive number: current=0, A=1, B=2, ... */
   APIRET  rc           = NO_ERROR;      /* Return code                     */

   cbDirPathLen = (ULONG) sizeof(achOrigDirName);
   rc = DosQueryCurrentDir(ulDriveNum, achOrigDirName, &cbDirPathLen);

   if (rc != NO_ERROR) {
      printf("DosQueryCurrentDir error: return code = %u\n", rc);
      return 1;
   } else printf ("Original dir. = \\%s\n", achOrigDirName);

   pEABuf = NULL;  /* Indicate no EAs are to be defined for the directory  */
   rc = DosCreateDir(achNewDirName, pEABuf);   /* Create the new directory */

   if (rc != NO_ERROR) {
      printf("DosCreateDir error: return code = %u\n", rc);
      return 1;
   }

   rc = DosSetCurrentDir (achNewDirName);   /* Change to new directory     */

   ulDriveNum = 0;
   cbDirPathLen = (ULONG) sizeof(achDirName);
   rc = DosQueryCurrentDir(ulDriveNum, achDirName, &cbDirPathLen);

   if (rc != NO_ERROR) {
      printf("DosQueryCurrentDir error: return code = %u\n", rc);
      return 1;
   } else printf ("Current dir.  = \\%s\n", achDirName);

   strcpy(achDirName,"\\");

   rc = DosSetCurrentDir (achDirName);     /* Change to root directory     */
   rc = DosDeleteDir (achNewDirName);      /* Delete the new directory     */

   return NO_ERROR;
}