Python/Pygame-我如何编写一个程序，这样一旦他们按下一个键，其他程序就不能被激活？

import pygame
import ctypes

def block_program():
    # 获取当前窗口句柄
    hwnd = pygame.display.get_wm_info()["window"]
    # 将窗口设置为最前端
    ctypes.windll.user32.SetForegroundWindow(hwnd)

def main():
    pygame.init()
    screen = pygame.display.set_mode((400, 300))
    pygame.display.set_caption("Block Program")
    
    running = True
    while running:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                running = False
            elif event.type == pygame.KEYDOWN:
                # 按下任意键后，调用block_program函数将窗口设置为最前端
                block_program()
        
        screen.fill((255, 255, 255))
        pygame.display.flip()

    pygame.quit()

if __name__ == "__main__":
    main()