WindowsAPI笔记(二)---动手写第一个Windows程序

#include <windows.h>#include <iostream>#include <stdio.h>using namespace std;const string ProgramTitle = "Hello Windows";LRESULT CALLBACK WinProc(HWND hWnd, UINT message,  WPARAM wParam, LPARAM lParam){string text = "Hello Windows!";switch (message){case WM_CHAR:char szChar[20];sprintf(szChar,"char code is %d",wParam);MessageBox(hWnd,szChar,"char",0);break;case WM_CLOSE:if(IDYES==MessageBox(hWnd,"是否真的结束？","message",MB_YESNO)){ DestroyWindow(hWnd);}break;case WM_DESTROY:PostQuitMessage(0);break;default:return DefWindowProc(hWnd, message, wParam, lParam);}return 0;}//设置程序所需的主窗口类的值。ATOM MyRegisterClass(HINSTANCE hInstance){WNDCLASSEX wc;wc.cbSize= sizeof(WNDCLASSEX);wc.style= CS_HREDRAW | CS_VREDRAW;//窗口样式wc.lpfnWndProc    = (WNDPROC)WinProc;//指向一个回调函数的长指针wc.cbClsExtra= 0;wc.cbWndExtra= 0;//增加一些额外的内存空间wc.hInstance= hInstance;//传递给MyRegisterClass的hInstance参数值。主窗口需要知道正在使用的是哪个实例。wc.hIcon= NULL;wc.hCursor    = LoadCursor(NULL, IDC_ARROW);wc.hbrBackground= (HBRUSH)GetStockObject(WHITE_BRUSH);//用于绘制程序窗口背景的一个刷子句柄。wc.lpszMenuName = 0;//程序菜单名称wc.lpszClassName= ProgramTitle.c_str();//给窗口指定特定的类名称。wc.hIconSm    = NULL;return RegisterClassEx(&wc);}//用于创立程序，基本上只创建程序窗口。BOOL InitInstance(HINSTANCE hInstance, int nCmdShow){HWND hWnd = CreateWindow(ProgramTitle.c_str(),ProgramTitle.c_str(),WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,CW_USEDEFAULT,640,480,NULL,NULL,hInstance,NULL);   if (hWnd==0)   {      return 0;   }   ShowWindow(hWnd, nCmdShow);   UpdateWindow(hWnd);   return 1;}int APIENTRY WinMain(HINSTANCE hInstance,                     HINSTANCE hPrevInstance,                     LPTSTR    lpCmdLine,                     int       nCmdShow){MyRegisterClass(hInstance);if (!InitInstance (hInstance, nCmdShow)){return FALSE;}MSG msg;BOOL bRet;// 主消息循环:while ((bRet=GetMessage(&msg, NULL, 0, 0))!=0){if (bRet==-1) break;TranslateMessage(&msg);DispatchMessage(&msg);}return (int) msg.wParam;}