unresolved external during _spawnl

when I compile this code:
------------------begin code--------------------------
#include <stdio.h>
#include <conio.h>
#include <process.h>

void main()
{
_spawnl( _P_OVERLAY, "baldor.exe", "baldor.exe", NULL);
return 0;
}
------------------end code--------------------------

using Microsoft Visual C++ 1.0
I get these errors:

Compiling...
warning C4013: '_spawnl' undefined; assuming extern returning int
warning C4098: 'main' : 'void' function returning a value

Linking...
error L2029: '__p_overlay' : unresolved external
error L2029: '__spawnl' : unresolved external

Can anyone help?
Thanks.

>warning C4098: 'main' : 'void' function returning a value

Solve this first, it's easy.


Then, goto www.msdn.microsoft.com and look for spawnl.
When you find the page, it lists the headerfiles you need.
Use them.

Make sure Version 1.0 supports this function. It looks right for Version 6.0.

Thanks, fixing warning C4098 was easy, my bad.

Version 1.0 must not support spawn, exec, or system. I've tried them all with the same result (unresolved external). Microsoft online & my Visual C++ help say only <process.h> & <stdio.h> are required, but the program still does not compile (or Link). I will need to upgrade.

Why are you using 1.0?

I picked it up in the discount bin at a bookstore a few years ago. It's what I had at the time I wanted to write this program so I used it. I'm not writing anything fancy, people have been executing programs for decades, I thought it would work. The help files even say it should, the header file includes spawn & exec. I still think I'm missing something, but I'll try getting the Borland 5.5 working on me system.