C++ Get ProcessID by searching process name in a snapshot of runing processes

get_pid_by_process_name.cpp

// https://docs.microsoft.com/en-us/windows/win32/toolhelp/taking-a-snapshot-and-viewing-processes

#include <windows.h> // Must include before TlHelp32.h
#include <TlHelp32.h>

DWORD GetPIDByProcessName(const wchar_t* processName)
{
	DWORD PID = 0;
	HANDLE hProcessSnapshot;
	PROCESSENTRY32 PE32;

	// Take a snapshot of all processes in the system.
	hProcessSnapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, NULL);
	if (hProcessSnapshot == INVALID_HANDLE_VALUE)
	{
		std::cout << "<CreateToolhelp32Snapshot> Invalid handle";
		return 0;
	}

	// Set the size of the structure before using it.
	PE32.dwSize = sizeof(PROCESSENTRY32);

	// Retrieves information about the first process and exit if unsuccessful
	if (!Process32First(hProcessSnapshot, &PE32))
	{
		std::cout << "<Process32First> Error " << GetLastError() << '\n';
		CloseHandle(hProcessSnapshot);
		return 0;
	}

	// Now walk the snapshot of processes,
	// and find the right process then get its PID
	do
	{
		// Returns 0 value indicates that both wchar_t* string are equal
		if (wcscmp(processName, PE32.szExeFile) == 0)
		{
			PID = PE32.th32ProcessID;
			break;
		}
	} while (Process32Next(hProcessSnapshot, &PE32));

	CloseHandle(hProcessSnapshot);
	return PID;
}

std::cout << GetPIDByProcessName(L"explorer.exe");