This example shows how to obtain the application type of an executable file.

#define INCL_DOSSESMGR   /* Session Manager values */
#define INCL_DOSERRORS   /* DOS error values       */
#include <os2.h>
#include <stdio.h>

int main (VOID) {
   PSZ      szAppName = "C:\\OS2\\SYSLOG.EXE";  /* Application name      */
   ULONG    AppType = 0;            /* Application type flags (returned) */
   APIRET   rc      = NO_ERROR;     /* Return code                       */

   rc = DosQueryAppType(szAppName, &AppType);
                     /* On successful return, the AppType      */
                     /*   variable contains a set of bit flags */
                     /*   that describe the application type   */
                     /*   of the specified executable file     */

   if (rc != NO_ERROR) {
      printf("DosQueryAppType error: return code = %u\n", rc);
      return 1;
   } else {
    printf("Appname = %s\n", szAppName);
    printf("Apptype = %d\n", AppType & FAPPTYP_EXETYPE);
    printf(" Window API?     %s\n", (AppType & FAPPTYP_WINDOWAPI) ? "Y" : "N");
    printf(" Window compat?  %s\n", (AppType & FAPPTYP_WINDOWCOMPAT) ? "Y" : "N");
    printf(" Family API?     %s\n", (AppType & FAPPTYP_BOUND) ? "Y" : "N");
    printf(" PC/DOS format?  %s\n", (AppType & FAPPTYP_DOS) ? "Y" : "N");
    printf(" DLL?            %s\n",
                      (AppType & (FAPPTYP_DLL | FAPPTYP_PROTDLL) ) ? "Y" : "N");
   }
   return NO_ERROR;
}