C++ WinAPI, close window by title

close_window_by_title.cpp

#include <windows.h>
#include <iostream>

int main(int argc, char* argv[]) {

	if (argc <= 1) {

		std::cerr << "ERROR: Please, specify the window title to close" << std::endl;

		return EXIT_FAILURE;
	}

	auto hwnd = FindWindow(nullptr, argv[1]);

	if (hwnd != nullptr) {

		std::cout << "Closing \"" << argv[1] << "\"" << std::endl;

		PostMessage(hwnd, WM_CLOSE, 0, 0);

	} else {

		std::cerr << "ERROR: Can't find the window to close" << std::endl;

		return EXIT_FAILURE;
	}

	return EXIT_SUCCESS;
}