DosQueryModuleName

Returns the fully-qualified drive, path, file name, and extension associated with the referenced module handle.

Syntax

#define INCL_DOSMODULEMGR
#include <os2.h>

HMODULE  hmod;    /* The handle of the dynamic link module that is being referenced. */
ULONG    cbName;  /* The maximum length of the buffer, in bytes,
                     where the name will be stored. */
PCHAR    pch;     /* The address of the buffer where the file specification
                     of the module are returned. */
APIRET   ulrc;    /* Return Code. */

ulrc = DosQueryModuleName(hmod, cbName, pch);

Parameters

hmod (HMODULE) - input

The handle of the dynamic link module that is being referenced.

This handle is provided in the DI register on entry to a module, or on the initialization entry to a dynamic link routine.

cbName (ULONG) - input

The maximum length of the buffer, in bytes, where the name will be stored.

pch (PCHAR) - output

The address of the buffer where the file specification of the module are returned.

Return Code

ulrc (APIRET) - returns

DosQueryModuleName returns one of the following values:

• 0 NO_ERROR
• 6 ERROR_INVALID_HANDLE
• 24 ERROR_BAD_LENGTH

Remarks

DosQueryModuleName returns the fully qualified drive, path, file name, and extension associated with the referenced module handle.

If the buffer is not large enough, an error is returned.

Example Code

This example attempts to obtain the handle of a dynamic link module named "DISPLAY.DLL," and then tests whether it is currently loaded or not.

#define INCL_DOSMODULEMGR   /* Module Manager values */
#define INCL_DOSERRORS      /* DOS Error values */
#include <os2.h>
#include <stdio.h>

int main(VOID) {
   PSZ     ModuleName    = "C:\\OS2\\DLL\\DISPLAY.DLL";  /* Module name   */
   HMODULE ModuleHandle  = NULLHANDLE;                   /* Module handle */
   APIRET  rc            = NO_ERROR;                     /* Return code   */

   rc = DosQueryModuleHandle(ModuleName,      /* Module to look for       */
                             &ModuleHandle);  /* Handle (returned)        */
   if (rc != NO_ERROR) {
      printf("DosQueryModuleHandle error: return code = %u\n", rc);
      return 1;
   } else {
      printf ("Module handle = %u\n", ModuleHandle);
   }

   rc = DosQueryModuleName (ModuleHandle,   /* Module handle to query     */
                            256L,           /* Maximum length of result   */
                            ModuleName);    /* Module name returned       */

   if (rc != NO_ERROR) {
      printf("DosQueryModuleName error: return code = %u\n", rc);
      return 1;
   } else {
      printf ("Module name = %s\n", ModuleName);
   }
   return NO_ERROR;
}

Related Functions

• DosFreeModule
• DosLoadModule
• DosQueryModuleHandle