使用C Windows 8關閉屏幕

Question

我想使用C編寫一個非常小的應用程序，該應用程序可以打開或關閉屏幕。 映射鍵以調用特定功能應該不難。

哪些系統命令可以在Windows上打開或關閉屏幕？

謝謝

Answer 1

// Turn off monitor
Sleep(500); // Eliminate user's interaction for 500 ms
SendMessage(HWND_BROADCAST, WM_SYSCOMMAND, SC_MONITORPOWER, (LPARAM) 2);

// Turn on monitor
SendMessage(HWND_BROADCAST, WM_SYSCOMMAND, SC_MONITORPOWER, (LPARAM) -1);

// Low power monitor
Sleep(500); // Eliminate user's interaction for 500 ms
SendMessage(HWND_BROADCAST, WM_SYSCOMMAND, SC_MONITORPOWER, (LPARAM) 1);

注意

**1** - the display is going to low power.
**2** - the display is being shut off.
**-1** - the display is being turned on (undocumented value).