窗口过程_框架基础

#include <windows.h>#pragma comment(lib, "winmm") LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);int WINAPI WinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _In_ LPSTR lpCmdLine, _In_ int nShowCmd){static TCHAR str1[] = TEXT("李赛赛爱邱坤小美女\n");HWND hwnd1;MSG msg1;//也是一个结构体WNDCLASS wndclass;//窗口过程类是个结构体wndclass.style = CS_HREDRAW | CS_VREDRAW;//窗口过程类初始化wndclass.lpfnWndProc = WndProc;wndclass.cbClsExtra = 0;wndclass.cbWndExtra = 0;wndclass.hInstance = hInstance;wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);wndclass.hbrBackground =(HBRUSH) GetStockObject(WHITE_BRUSH);//得到库存wndclass.lpszMenuName = NULL;wndclass.lpszClassName = str1;if (!RegisterClass(&wndclass))//注册窗口过程类{MessageBox(NULL, TEXT("注册窗口过程类错误"), TEXT("错误"), 0);return 0;}hwnd1 = CreateWindow(str1, L"邱坤小美女", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL);//1标题 WM_CREATEShowWindow(hwnd1, nShowCmd);//WM_SIZE WM_SHOWWINDOWUpdateWindow(hwnd1);//WM_PAINT//从消息队列获取消息while (GetMessage(&msg1, NULL, 0, 0))//消息循环 检索消息{TranslateMessage(&msg1);//调动消息 翻译一些键盘消息 转换给windowsDispatchMessage(&msg1);//分派消息 将消息发给窗口过程 转换给windows 分发消息}return msg1.wParam;//MessageBox(NULL, L"22222", L"1111111", 0);}LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)//窗口回调函数 lParam低位是客户区的宽度  高位是客户区的高度  wParam低位鼠标在滚动条上的动作(通知码) 高位用户拖动滑块的当前位置{HDC         hdc;PAINTSTRUCT ps; //绘画结构RECT        rect;switch (message){case WM_CREATE:PlaySound(TEXT("hellowin.wav"), NULL, SND_FILENAME | SND_ASYNC);return 0;case WM_PAINT://话绘画   UpdateWindow  窗口创建 尺寸改变 最小化还原 被遮挡覆盖  首先让客户区有效化hdc = BeginPaint(hwnd, &ps);//窗口绘制开始 客户区变的有效 获取hdcGetClientRect(hwnd, &rect);DrawText(hdc, TEXT("我爱邱坤"), -1, &rect,DT_SINGLELINE | DT_CENTER | DT_VCENTER);EndPaint(hwnd, &ps);//释放hdcreturn 0;case WM_DESTROY://摧毁PostQuitMessage(0);//将退出消息插入消息队列 投递(post)return 0;}return DefWindowProc(hwnd, message, wParam, lParam);//执行默认的消息处理}