See if WCHAR* is substring of WCHAR in C

Question

I am using the Windows function CreateToolhelp32snapshot to enumerate running processes on my machine. The pe32.szeFileName field it returns is a WCHAR, and this is the executable's name.

I want to compare each executable name to a long array of executables I produce, like so:

WCHAR* processNames[numProcesses] = { "word", "excel", "outlook, ...}

Unfortunately, I don't know how to check if any element of this processNames array is a substring of the WCHAR returned from pe32.szeFilename.

I know wcsstr would work if I was dealing with two const wchar_t * strings. How can I compare the WCHARreturned by pe32.szeFilename with each element of an array of strings? Specifically, I want to see if any string in the array (any kind of format is fine) is a substring of the WCHAR.

EDIT: My current loop:

do {

    wprintf(L"Process name: %s\n", pe32.szExeFile);
    for (int i = 0; i < numProcesses; ++i) {
        if (wcsstr(pe32.szExeFile, processNames[i])) {
            // Found it
            wprintf("%s", pe32.szExeFile);

        }
    }

} while (Process32Next(hProcessSnap, &pe32));

Answer 1

The question tagged with unicode, so I suppose, you should try to change all literals' declaration to L"characters", e.g.:

WCHAR* processNames[numProcesses] = { L"word", L"excel", L"outlook", ...}

then check that appropriate unicode functions are used, e.g. UNICODE is defined or function names with W used:

Process32FirstW(hProcessSnap, &pe32);
. . . 
Process32NextW(hProcessSnap, &pe32);

and finally (start from that one, perhaps this allows you to see the result of condition of if), use L"%s" for wprintf:

wprintf(L"%s", pe32.szExeFile);

UPDATE:

Just to check behavior of wprintf I wrote a small piece of code (Visual Studio 2013 was used), so result of

#include <tchar.h>
#include <windows.h>

int main(void)
{
    WCHAR* procName = L"excel";

    WCHAR* processNames[3] = { L"word", L"excel", L"outlook" };

    wprintf(L"Process name: %s\n", procName);
    for (int i = 0; i < 3; ++i) {
       if (wcsstr(procName, processNames[i])) {
           wprintf("%s", procName);
       }
    }
    return 0;
}

is

Process name: excel

(i.e. looks like if has false condition),

but code (only one L added for wprintf inside loop)

#include <tchar.h>
#include <windows.h>

int main(void)
{
    WCHAR* procName = L"excel";

    WCHAR* processNames[3] = { L"word", L"excel", L"outlook" };

    wprintf(L"Process name: %s\n", procName);
    for (int i = 0; i < 3; ++i) {
       if (wcsstr(procName, processNames[i])) {
           wprintf(L"%s", procName);
       }
    }
    return 0;
}

shows

Process name: excel

excel