Win32骨架程序

众所周知，windows程序的核心就是窗口。
今天我们就来利用最古老的Win32应用来创建一个基本的窗口骨架。
代码如下：

// DEMO2_3.CPP - A complete windows program

// INCLUDES ///////////////////////////////////////////////
#define WIN32_LEAN_AND_MEAN  // just say no to MFC

#include <windows.h>   // include all the windows headers
#include <windowsx.h>  // include useful macros
#include <stdio.h>     
#include <math.h>

// DEFINES ////////////////////////////////////////////////

// defines for windows 
#define WINDOW_CLASS_NAME "WINCLASS1"

// GLOBALS ////////////////////////////////////////////////


// FUNCTIONS //////////////////////////////////////////////
LRESULT CALLBACK WindowProc(HWND hwnd, 
                            UINT msg, 
                            WPARAM wparam, 
                            LPARAM lparam)
{
    // this is the main message handler of the system
    PAINTSTRUCT        ps;        // used in WM_PAINT
    HDC                hdc;            // handle to a device context

    // what is the message 
    switch(msg)
    {    
        case WM_CREATE: 
    {
            // do initialization stuff here

      // return success
            return(0);
        } 
        break;

        case WM_PAINT: 
        {
            // simply validate the window
            hdc = BeginPaint(hwnd,&ps);     
            
            // you would do all your painting here
      EndPaint(hwnd,&ps);

      // return success
            return(0);
       } 
        break;

        case WM_DESTROY: 
        {
            // kill the application, this sends a WM_QUIT message 
            PostQuitMessage(0);

      // return success
            return(0);
        } 
        break;

        default:break;
    }

    // process any messages that we didn't take care of 
    return (DefWindowProc(hwnd, msg, wparam, lparam));
}

//////////////////////// WINMAIN //////////////////////////
int WINAPI WinMain(    HINSTANCE hinstance,
                    HINSTANCE hprevinstance,
                    LPSTR lpcmdline,
                    int ncmdshow)
{
    WNDCLASSEX winclass;    // this will hold the class we create
    HWND       hwnd;                // generic window handle
    MSG           msg;                    // generic message

    // first fill in the window class stucture
    winclass.cbSize = sizeof(WNDCLASSEX);
    winclass.style = CS_DBLCLKS | CS_OWNDC | CS_HREDRAW | CS_VREDRAW;
    winclass.lpfnWndProc = WindowProc;
    winclass.cbClsExtra    = 0;
    winclass.cbWndExtra = 0;
    winclass.hInstance = hinstance;
    winclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    winclass.hCursor = LoadCursor(NULL, IDC_ARROW);
    winclass.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
    winclass.lpszMenuName    = NULL;
    winclass.lpszClassName = WINDOW_CLASS_NAME;
    winclass.hIconSm = LoadIcon(NULL, IDI_APPLICATION);

    // register the window class
    if (!RegisterClassEx(&winclass))
        return(0);

    // create the window
    if (!(hwnd = CreateWindowEx(NULL,                                            // extended style
                                                            WINDOW_CLASS_NAME,                // class
                                    "My Basic Window",                                        // title
                                    WS_OVERLAPPEDWINDOW | WS_VISIBLE,
                                     0,0,                                                                    // initial x,y
                                    400,400,                                                            // initial width, height
                                    NULL,                                                                    // handle to parent 
                                    NULL,                                                                    // handle to menu
                                    hinstance,                                                        // instance of this application
                                    NULL)))                                                                // extra creation parms
    return(0);
    
    // enter main event loop
    while(GetMessage(&msg,NULL,0,0))
     { 
         // translate any accelerator keys
         TranslateMessage(&msg);

         // send the message to the window proc
         DispatchMessage(&msg);
    }
    
    // return to Windows like this
    return(msg.wParam);

}