WinMain() not receiving enough args if opened by double-clicking the file - c++

Question

I used to be able to double-click files of my custom extension and open it via my C++ exe program (right click-> open with -> my program). The program was correctly receiving args.
Its WinMain() was receiving several args: the first argument was path to exe and the second argument was the path to the clicked file.
However, I no longer seem to be able to receive the second argument, it always launches my program with 1 argument: the path to this program.
Could it be because of the Windows Update I did today? Using Windows 10 and Visual Studio (same happens if compiled in Debug or in Release)
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow){
int nArgs;
LPWSTR *szArglist = CommandLineToArgvW(GetCommandLine(), &nArgs); //GetCommandLine() is a #define located inside processenv.h
//Now nArgs is your argc and szarglist is your argv
//first arg is path to exe, second arg is path to clicked file.
if(nArgs<=1){ LocalFree(szArglist); return EXIT_FAILURE; } //not enough args (1 or less)
LocalFree(szArglist);
return EXIT_SUCCESS;
}

Answer 1

It was because of how I was fetching the arguments.
I was using CommandLineToArgvW(), but when I instead started to use __argv and __argc it started working. Found this answer here
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow){
if(__argc<=1){ return EXIT_FAILURE; } //not enough args (1 or less)
/*use __argv[1] to fetch your second argument (in my case it's filepath) */
return EXIT_SUCCESS;
}