运行之后，只需要打开对应的应用即可获取，系统轮询1秒1次

#include<iostream> 
#include<Windows.h> 
using namespace std;
int main() {
	HWND Windows;
	while (true) {
		Windows = GetForegroundWindow(); //获取窗口实例子
		DWORD dwProcess;
		LRESULT result = 0;
		DWORD dwPID = GetWindowThreadProcessId(Windows, &dwProcess);
		cout << "dwPID = " << dwPID << endl;
		HANDLE hProcess = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, dwProcess);
		WCHAR wszProcessPath[MAX_PATH] = { 0 };
		DWORD dwSize = MAX_PATH;
		QueryFullProcessImageNameW(hProcess, 0, wszProcessPath, &dwSize);
		CHAR wszTitle[MAX_PATH] = { 0 };
		result = GetWindowTextA(Windows, wszTitle, MAX_PATH);
		cout << "窗口标题:[" << wszTitle << "]" << endl;
		Sleep(1000);
	}
        return true;
}