CreateProcess, first parameter question - c++

Question

I am trying to create a process called s2.exe. However I'm having trouble figuring out what needs to be passed in as the first argument. I tried putting the name and location of where the process would be located but I get "Error 2 starting CC". What exactly should go in the first parameter? (According to MSDN it is the path to the module.)
int main()
{
PROCESS_INFORMATION po;
STARTUPINFO s;
GetStartupInfo (&s);
if(CreateProcess(L"c:/s2", NULL, NULL, NULL,
false, 0, NULL, NULL, &s, &po) == FALSE)
{
printf("Error %d starting CC\n", GetLastError());
return -1;
}
}

Answer 1

A value of 2 returned from GetLastError() indicates ERROR_FILE_NOT_FOUND. You need to pass in c:/s2.exe, assuming that s2.exe is actually in the c:\ drive.
Note that the MSDN documentation for the lpApplicationName parameter in CreateProcess() says:
The string can specify the full path and file name of the module to execute or it can specify a partial name. In the case of a partial name, the function uses the current drive and current directory to complete the specification. The function will not use the search path. This parameter must include the file name extension; no default extension is assumed.
Also note that void main() is not standard C++. However, int main() is standard C++, and allows you to return some kind of exit code. (I edited your code snippet to reflect that.)

Answer 2

MSDN says about the lpApplicationName of the CreateProcess function:
This parameter must include the file name extension; no default extension is assumed.

Answer 3

You need L"c:\s2" rather than L"c:/s2". Microsoft prefers backslashes in paths. Forward slashes are accepted in some contexts but are generally problematic in code.