This example finds the file/directory of the <WP_OS2SYS> object..

#define INCL_WINWORKPLACE
#include <os2.h>

HOBJECT hObject;
CHAR    szPath[CCHMAXPATH + 1];
BOOL    fSuccess;

hObject = WinQueryObject("<WP_OS2SYS>");
if (hObject != NULL)
{
  /* WinQueryObject was successful */

  fSuccess = WinQueryObjectPath(hObject,szPath,sizeof(szPath));
  if (fSuccess)
  {
    /* WinQueryObjectPath was successful */
  }
  else
  {
    /* WinQueryObjectPath failed */
  }
}
else
{
  /* WinQueryObject failed */
}