_pgmptr, _wpgmptr

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When a program is run from the command interpreter (CMD.EXE), _pgmptr is automatically initialized to the full path of the executable file. For example, if HELLO.EXE is in C:\BIN and C:\BIN is in the path, _pgmptr is set to C:\BIN\HELLO.EXE when you execute

C> hello

When a program is not run from the command line, _pgmptr may be initialized to the program name (the file’s base name without the extension), or to a filename, a relative path, or a full path.

_wpgmptr is the wide-character counterpart of _pgmptr for use with programs that use wmain. _pgmptr and _wpgmptr are declared in STDLIB.H as

externchar*_pgmptr;

externwchar_t*_pgmptr;

The following program demonstrates the use of _pgmptr.

/*
 * PGMPTR.C: The following program demonstrates the use of _pgmptr.
 */

#include <stdio.h>
#include <stdlib.h>
void main( void )
{
   printf("The full path of the executing program is : %Fs\n",
     _pgmptr);
}