vc++入门第一篇，如何使用C++生成windows窗口程序

1、首先打开VS2010，新建项目，选择VC++，选择WIN32项目，注意勾选空项目，点击完成即可

2、在源文件文件夹下新建一个CPP文件，拷入一下代码：

// GT_HelloWorldWin32.cpp
// compile with: /D_UNICODE /DUNICODE /DWIN32 /D_WINDOWS /c

#include <windows.h>
#include <stdlib.h>
#include <string.h>
#include <tchar.h>

// Global variables

// The main window class name.
static TCHAR szWindowClass[] = _T(“win32app”);

// The string that appears in the application’s title bar.
static TCHAR szTitle[] = _T(“Win32 Guided Tour Application”);

HINSTANCE hInst;

// Forward declarations of functions included in this code module:
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

int WINAPI WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
WNDCLASSEX wcex;

wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style          = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc    = WndProc;
wcex.cbClsExtra     = 0;
wcex.cbWndExtra     = 0;
wcex.hInstance      = hInstance;
wcex.hIcon          = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_APPLICATION));
wcex.hCursor        = LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground  = (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName   = NULL;
wcex.lpszClassName  = szWindowClass;
wcex.hIconSm        = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_APPLICATION));

if (!RegisterClassEx(&wcex))
{
MessageBox(NULL,
_T(“Call to RegisterClassEx failed!”),
_T(“Win32 Guided Tour”),
NULL);

return 1;
}

hInst = hInstance; // Store instance handle in our global variable

// The parameters to CreateWindow explained:
// szWindowClass: the name of the application
// szTitle: the text that appears in the title bar
// WS_OVERLAPPEDWINDOW: the type of window to create
// CW_USEDEFAULT, CW_USEDEFAULT: initial position (x, y)
// 500, 100: initial size (width, length)
// NULL: the parent of this window
// NULL: this application does not have a menu bar
// hInstance: the first parameter from WinMain
// NULL: not used in this application
HWND hWnd = CreateWindow(
szWindowClass,
szTitle,
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
500, 100,
NULL,
NULL,
hInstance,
NULL
);

if (!hWnd)
{
MessageBox(NULL,
_T(“Call to CreateWindow failed!”),
_T(“Win32 Guided Tour”),
NULL);

return 1;
}

// The parameters to ShowWindow explained:
// hWnd: the value returned from CreateWindow
// nCmdShow: the fourth parameter from WinMain
ShowWindow(hWnd,
nCmdShow);
UpdateWindow(hWnd);

// Main message loop:
MSG msg;
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}

return (int) msg.wParam;
}

//
//  FUNCTION: WndProc(HWND, UINT, WPARAM, LPARAM)
//
//  PURPOSE:  Processes messages for the main window.
//
//  WM_PAINT    – Paint the main window
//  WM_DESTROY  – post a quit message and return
//
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
PAINTSTRUCT ps;
HDC hdc;
TCHAR greeting[] = _T(“Hello, World!”);

switch (message)
{
case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);

// Here your application is laid out.
// For this introduction, we just print out “Hello, World!”
// in the top left corner.
TextOut(hdc,
5, 5,
greeting, _tcslen(greeting));
// End application-specific layout section.

EndPaint(hWnd, &ps);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
break;
}

return 0;
}

3、程序代码结构

（1）首先定义winmain函数，作为进程的入口函数

（2）定义窗口类wcex

(3) 注册窗口类

（4）创建窗口，并生成窗口句柄

（5）显示窗口

（6）循环处理窗口接受消息，获取消息，解析消息，分配消息，其中消息处理是由之前构造的窗口类中的lpfnWndProc属性决定。在这里就是WndProc函数，WndProc根据传来消息的编号，进行不同处理。