通过程序理解windows程序的运行机制

 

vc6.0下的：

 1#include <windows.h>
 2#include <stdio.h>
 3
 4LRESULT CALLBACK WinSunProc(
 5  HWND hwnd,      // handle to window
 6  UINT uMsg,      // message identifier
 7  WPARAM wParam,  // first message parameter
 8  LPARAM lParam   // second message parameter
 9);

int WINAPI WinMain(
  HINSTANCE hInstance,      // handle to current instance
  HINSTANCE hPrevInstance,  // handle to previous instance
  LPSTR lpCmdLine,          // command line
  int nCmdShow              // show state
)
{
    WNDCLASS wndcls;
    wndcls.cbClsExtra=0;
    wndcls.cbWndExtra=0;
    wndcls.hbrBackground=(HBRUSH)GetStockObject(BLACK_BRUSH);
    wndcls.hCursor=LoadCursor(NULL,IDC_CROSS);
    wndcls.hIcon=LoadIcon(NULL,IDI_ERROR);
    wndcls.hInstance=hInstance;
    wndcls.lpfnWndProc=WinSunProc;
    wndcls.lpszClassName="Windows";
    wndcls.lpszMenuName=NULL;
    wndcls.style=CS_HREDRAW | CS_VREDRAW;
    RegisterClass(&wndcls);

    HWND hwnd;
    hwnd=CreateWindow("Windows","典型Windows程序",WS_OVERLAPPEDWINDOW,
        0,0,600,400,NULL,NULL,hInstance,NULL);

    ShowWindow(hwnd,SW_SHOWNORMAL);
    UpdateWindow(hwnd);

    MSG msg;
    while(GetMessage(&msg,NULL,0,0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    return 0;
}

LRESULT CALLBACK WinSunProc(  HWND hwnd,  UINT uMsg,  WPARAM wParam,  LPARAM lParam   )
{
    switch(uMsg)
    {
    case WM_CHAR:
         char szChar[20];
        sprintf(szChar,"char is %d",wParam);
         MessageBox(hwnd,szChar,"Windows",0);
         break;
     case WM_LBUTTONDOWN:
         MessageBox(hwnd,"mouse clicked","weixin",0);
         HDC hdc;
         hdc=GetDC(hwnd);
         TextOut(hdc,0,50,"鼠标左键单击",strlen("鼠标左键单击"));
         ReleaseDC(hwnd,hdc);
         break;
     case WM_PAINT:
         HDC hDC;
         PAINTSTRUCT ps;
         hDC=BeginPaint(hwnd,&ps);
         TextOut(hDC,0,0,"Winows程序",strlen("Winows程序"));
        EndPaint(hwnd,&ps);
         break;
     case WM_CLOSE:
         if(IDYES==MessageBox(hwnd,"是否真的结束？","Winows",MB_YESNO))
         {
             DestroyWindow(hwnd);
         }
         break;
     case WM_DESTROY:
         PostQuitMessage(0);
         break;
    default:
        return DefWindowProc(hwnd,uMsg,wParam,lParam);
    }
    return 0;
}

 

vs2008下的：

 1#include<windows.h>
 2
 3HINSTANCE hInst;
 4HWND wndHandle;
 5
 6bool initWindow(HINSTANCE hInstance);
 7LRESULT CALLBACK WndProc(HWND ,UINT ,WPARAM ,LPARAM );
 8
 9int WINAPI WinMain(
  HINSTANCE hInstance, 
  HINSTANCE hPrevInstance, 
  LPTSTR lpCmdLine, 
  int nCmdShow
)
{
    if(!initWindow(hInstance))
    {
        return false;
    }
    MSG msg;
    ZeroMemory(&msg,sizeof(msg));
    while(msg.message!=WM_QUIT)
    {
        while(GetMessage(&msg,NULL,0,0))
        {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
    }
    return (int)msg.wParam;
}
bool initWindow(HINSTANCE hInstance)
{
    WNDCLASSEX wcex;
    wcex.cbSize=sizeof(WNDCLASSEX);
    wcex.style=CS_HREDRAW|CS_VREDRAW;
    wcex.lpfnWndProc=(WNDPROC)WndProc;
    wcex.cbClsExtra=0;
    wcex.cbWndExtra=0;
    wcex.hInstance=hInstance;
    wcex.hIcon=0;
    wcex.hCursor=LoadCursor(NULL,IDC_ARROW);
    wcex.hbrBackground=(HBRUSH)(COLOR_WINDOW+1);
    wcex.lpszMenuName=NULL;
    wcex.lpszClassName="DirectxExample";
    wcex.hIconSm=0;
    RegisterClassEx(&wcex);

    wndHandle=CreateWindow("DirectxExample","DirectxExample",
        WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT,
        CW_USEDEFAULT,
        640,
        480,
        NULL,
        NULL,
        hInstance,
        NULL);
    if(!wndHandle)
        return false;
    ShowWindow(wndHandle,SW_SHOW);
    UpdateWindow(wndHandle);
    return true;
}
LRESULT CALLBACK WndProc(HWND hWnd,UINT message,WPARAM wParam,LPARAM lParam)
{
    switch(message)
    {
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    }
    return DefWindowProc(hWnd,message,wParam,lParam);
}