Windows程序设计笔记（一）

Windows创建窗口的过程

1.首先定义一个窗口类，对窗口类赋值，后调用系统的RegisterClass函数注册这个窗口类；

2.窗口类注册成功后，调用CreateWindow创建窗口；

3.显示窗口更新窗口信息，体现在ShowWindow和UpdateWindow的调用上，相当于Java中的SetVisible；

4.注册消息的响应，构建消息循环；

5.编写消息响应函数，处理消息。

这个与Java中的消息处理机制大同小异。

 

具体代码如下：

 #include <Windows.h>//PlaySound所在的包#pragma comment(lib,"winmm.lib") //声明窗口过程LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);int WINAPI WinMain( __in HINSTANCE hInstance, __in_opt HINSTANCE hPrevInstance, __in_opt LPSTR lpCmdLine, __in int nShowCmd ){static TCHAR szAppName[] = TEXT("HelloWin");HWND hwnd;MSG msg;WNDCLASS wndclass;//创建窗口类wndclass.cbClsExtra = 0;wndclass.cbWndExtra = 0;wndclass.hbrBackground = (HBRUSH)GetStockObject(GRAY_BRUSH);wndclass.hCursor = LoadCursor(NULL,IDC_ARROW);wndclass.hIcon = LoadIcon(NULL,IDI_APPLICATION);wndclass.hInstance = hInstance;wndclass.lpfnWndProc = WndProc;wndclass.lpszClassName = szAppName;wndclass.lpszMenuName = NULL;wndclass.style = CS_HREDRAW|CS_VREDRAW;//注册窗口类if (!RegisterClass(&wndclass)){MessageBox(NULL,TEXT("RegisterClass Failed!"),TEXT("Error"),0);return 0;}//创建窗口hwnd = CreateWindow(szAppName,TEXT("HelloWin Program"),WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,NULL,NULL,hInstance,NULL);//显示窗口，更新窗口ShowWindow(hwnd,nShowCmd);UpdateWindow(hwnd);//消息循环，消息队列while (GetMessage(&msg,NULL,0,0)){TranslateMessage(&msg);DispatchMessage(&msg);}return msg.wParam;}LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam){HDC hdc;PAINTSTRUCT ps;RECT rect;switch (message){case WM_CREATE:PlaySound(TEXT("ab.wav"),NULL,SND_FILENAME|SND_ASYNC);return 0;case WM_PAINT:hdc = BeginPaint(hwnd,&ps);GetClientRect(hwnd,&rect);DrawText(hdc,TEXT("Hello,WindowsXP"),-1,&rect,DT_SINGLELINE|DT_CENTER|DT_VCENTER);EndPaint(hwnd,&ps);return 0;case WM_DESTROY:PostQuitMessage(0);return 0;}return DefWindowProc(hwnd,message,wParam,lParam);}