第一个 Win32 窗口程序

程序骨架 int WinMain(){ // 设计窗口外观及交互响应，注册，申请专利RegisterClass(...) ;// 生产窗口 CreateWindow(...); // 展示窗口 ShowWindow(...); // 粉刷窗口 UpdateWindow(...);// 进入消息循环 while (GetMessage(...));{ // 消息转换 TranslateMessage(...); // 消息分发 DispatchMessage(...); }

可以直接运行

#include <stdio.h>
#include <windows.h>//设计一个窗口类,填入参数
//注册窗口类
//创建窗口
//显示以及更新窗口
//循环等待消息
LPCTSTR clsName = "My";
LPCTSTR msgName = "欢迎学习";//回调函数
LRESULT CALLBACK MyWinProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);INT WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,PSTR lpCmdLine, INT nCmdShow)
{
// 	typedef struct tagWNDCLASSA {
// 		UINT      style;
// 		WNDPROC   lpfnWndProc;
// 		int       cbClsExtra;
// 		int       cbWndExtra;
// 		HINSTANCE hInstance;
// 		HICON     hIcon;
// 		HCURSOR   hCursor;
// 		HBRUSH    hbrBackground;
// 		LPCSTR    lpszMenuName;
// 		LPCSTR    lpszClassName;
// 	} WNDCLASSA, * PWNDCLASSA, * NPWNDCLASSA, * LPWNDCLASSA;//定义一个窗口对象WNDCLASS wndcls{};wndcls.cbClsExtra = NULL;wndcls.cbWndExtra = NULL;wndcls.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);wndcls.hCursor = LoadCursor(NULL, IDC_ARROW);wndcls.hIcon = LoadIcon(NULL, IDI_APPLICATION);wndcls.hInstance = hInstance;//定义交互响应wndcls.lpfnWndProc = MyWinProc;//定义窗口代号wndcls.lpszClassName = clsName;wndcls.lpszMenuName = NULL;wndcls.style = CS_HREDRAW | CS_VREDRAW;//注册窗口类RegisterClass(&wndcls);//创建窗口HWND hwnd;hwnd = CreateWindow(clsName, msgName, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL);//显示和刷新窗口ShowWindow(hwnd, SW_SHOWNORMAL);UpdateWindow(hwnd);//消息循环MSG msg;while (GetMessage(&msg,NULL,NULL,NULL)){TranslateMessage(&msg);DispatchMessage(&msg);}return msg.wParam;}
LRESULT __stdcall MyWinProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{//uMsg消息类型int ret;HDC hdc;switch (uMsg){case WM_CHAR:char szChar[20];sprintf_s(szChar, "您刚才按下了:%c", wParam);MessageBox(hwnd, szChar, "char", NULL);break;case WM_LBUTTONDOWN:MessageBox(hwnd,"检测鼠标左键按下","msg",NULL);break;case WM_PAINT:PAINTSTRUCT ps;hdc = BeginPaint(hwnd, &ps);TextOut(hdc, 0, 0, "www.baidu.com", strlen("www.baidu.com"));EndPaint(hwnd, &ps);MessageBox(hwnd, "重新绘制", "msg", NULL);break;case WM_CLOSE:ret = MessageBox(hwnd, "是否真要退出!", "msg", MB_YESNO);if(ret == IDYES){DestroyWindow(hwnd);}break;case WM_DESTROY:PostQuitMessage(0);break;default:return DefWindowProc(hwnd,uMsg,wParam,lParam);}return 0;
}