C++ 一键关闭屏幕

Demo下载地址：http://pan.baidu.com/s/1vN4wF

 

#include <windows.h>
#include "resource.h"LRESULT CALLBACK WindowProc( HWND hwnd,      // handle to windowUINT uMsg,      // message identifierWPARAM wParam,  // first message parameterLPARAM lParam   // second message parameter
                            );int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{// 延时防止双击exe关闭屏幕后，又打开屏幕。关闭屏幕的消息，先于系统的双击消息；Sleep(200);::SendMessage(HWND_BROADCAST, WM_SYSCOMMAND,  SC_MONITORPOWER,  (LPARAM)2);static TCHAR szAppName[] = TEXT("HelloWin");WNDCLASS wndClass;wndClass.style = CS_HREDRAW | CS_VREDRAW;wndClass.lpfnWndProc = WindowProc;wndClass.cbClsExtra = 0;wndClass.cbWndExtra = 0;wndClass.hInstance = hInstance;wndClass.hIcon = LoadIcon(hInstance, (char*)IDI_ICON1);wndClass.hCursor = LoadCursor(NULL, IDC_ARROW);wndClass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);wndClass.lpszMenuName = NULL;wndClass.lpszClassName = szAppName;if (!RegisterClass(&wndClass)){MessageBox(NULL, TEXT("注册窗口失败!"), TEXT(""), 0);return 0;}HWND hWnd = CreateWindow(szAppName, TEXT("Hello Program"),WS_OVERLAPPEDWINDOW, 0, 0, 0, 0,NULL, NULL, hInstance, NULL);::SendMessage(hWnd, WM_DESTROY, 0, NULL);return 0;
}LRESULT CALLBACK WindowProc( HWND hwnd,      // handle to windowUINT uMsg,      // message identifierWPARAM wParam,  // first message parameterLPARAM lParam   // second message parameter
                            )
{HDC  hdc;PAINTSTRUCT ps;RECT rect;switch (uMsg){case WM_DESTROY:PostQuitMessage(0);return 0;}return DefWindowProc(hwnd, uMsg, wParam, lParam);
}