Programming Windows程式開發設計指南->第七章 例子程式1

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 /*_############################################################################
  _##
  _##  Programming Windows程式開發設計指南->第七章 例子程式1
  _##  Author: xwlee                        
  _##  Time: 2007.06.22
  _##  Chang'an University
  _##  Development condition: win2003 Server+VC6.0
  _##
  _##  程式7-1  CONNECT
  _##  CONNECT.C 檔案
  _##  簡單的滑鼠處理:一個例子
  _##  程式只是進行驗證
  _## 
  _##
  _##    CONNECT.C -- Connect-the-Dots Mouse Demo Program
  _##     (c) Charles Petzold, 1998
  _##  
  _##########################################################################*/
#include <windows.h>

#define MAXPOINTS 1000

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,

                                          PSTR szCmdLine, int iCmdShow)

{

       static TCHAR szAppName[] = TEXT ("Connect") ;

       HWND                         hwnd ;

       MSG                           msg ;

       WNDCLASS                wndclass ;

    

       wndclass.style                                   = CS_HREDRAW | CS_VREDRAW ;

       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) ;

       wndclass.lpszMenuName                   = NULL ;

       wndclass.lpszClassName = szAppName ;

       if (!RegisterClass (&wndclass))

       {

              MessageBox (NULL, TEXT ("Program requires Windows NT!"),

                                                 szAppName, MB_ICONERROR) ;

              return 0 ;

       }

    

       hwnd = CreateWindow (       szAppName, TEXT ("Connect-the-Points Mouse Demo"),

                                                        WS_OVERLAPPEDWINDOW,

                                                        CW_USEDEFAULT, CW_USEDEFAULT,

                                                        CW_USEDEFAULT, CW_USEDEFAULT,

                                                        NULL, NULL, hInstance, NULL) ;

    

       ShowWindow (hwnd, iCmdShow) ;

       UpdateWindow (hwnd) ;

    

       while (GetMessage (&msg, NULL, 0, 0))

       {

              TranslateMessage (&msg) ;

              DispatchMessage (&msg) ;

       }

return msg.wParam ;

}

LRESULT CALLBACK WndProc (       HWND hwnd, UINT message, WPARAM wParam,LPARAM lParam)

{

       static POINT pt[MAXPOINTS] ;

       static int               iCount ;

       HDC                            hdc ;

       int                          i, j ;

       PAINTSTRUCT  ps ;

       switch (message)

     {

       case WM_LBUTTONDOWN:

              iCount = 0 ;

              InvalidateRect (hwnd, NULL, TRUE) ;

              return 0 ;

         

       case WM_MOUSEMOVE:

              if (wParam & MK_LBUTTON && iCount < 1000)

              {

                            pt[iCount  ].x = LOWORD (lParam) ;

                            pt[iCount++].y = HIWORD (lParam) ;

              

                            hdc = GetDC (hwnd) ;

                            SetPixel (hdc, LOWORD (lParam), HIWORD (lParam), 0) ;

                            ReleaseDC (hwnd, hdc) ;

              }

                                   return 0 ;

         

          case       WM_LBUTTONUP:

                     InvalidateRect (hwnd, NULL, FALSE) ;

                     return 0 ;

         

          case       WM_PAINT:

                     hdc = BeginPaint (hwnd, &ps) ;

         

                     SetCursor (LoadCursor (NULL, IDC_WAIT)) ;

                     ShowCursor (TRUE) ;

         

                     for (i = 0 ; i < iCount - 1 ; i++)

                                      for (j = i + 1 ; j < iCount ; j++)

                                      {

                                         MoveToEx (hdc, pt[i].x, pt[i].y, NULL) ;

                                         LineTo   (hdc, pt[j].x, pt[j].y) ;

               }

                     ShowCursor (FALSE) ;

                     SetCursor (LoadCursor (NULL, IDC_ARROW)) ;

                     EndPaint (hwnd, &ps) ;

                     return 0 ;

              

          case       WM_DESTROY:

                     PostQuitMessage (0) ;

                     return 0 ;

          }

          return DefWindowProc (hwnd, message, wParam, lParam) ;

}

 

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