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Crosshatch_Box.cpp
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Crosshatch_Box.cpp：Code Content
  2. #include <windows.h>  
  3. #include "Crosshatch_Box.h" 
  6. #if defined (WIN32)
  7. #define IS_WIN32 TRUE
  8. #else
  9. #define IS_WIN32 FALSE
  10. #endif
  12. #define IS_NT      IS_WIN32 && (BOOL)(GetVersion() < 0x80000000)
  13. #define IS_WIN32S  IS_WIN32 && (BOOL)(!(IS_NT) && (LOBYTE(LOWORD(GetVersion()))<4))
  14. #define IS_WIN95   (BOOL)(!(IS_NT) && !(IS_WIN32S)) && IS_WIN32
  16. HINSTANCE hInst;   // current instance
  18. LPCTSTR lpszAppName  = "MyApp";
  19. LPCTSTR lpszTitle    = "My Application"; 
  21. BOOL RegisterWin95( CONST WNDCLASS* lpwc );
  23. int APIENTRY WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance,
  24.                       LPTSTR lpCmdLine, int nCmdShow)
  25. {
  26.    MSG      msg;
  27.    HWND     hWnd; 
  28.    WNDCLASS wc;
  30.    // Register the main application window class.
  31.    //............................................
  32.    wc.style         = CS_HREDRAW | CS_VREDRAW;
  33.    wc.lpfnWndProc   = (WNDPROC)WndProc;       
  34.    wc.cbClsExtra    = 0;                      
  35.    wc.cbWndExtra    = 0;                      
  36.    wc.hInstance     = hInstance;              
  37.    wc.hIcon         = LoadIcon( hInstance, lpszAppName ); 
  38.    wc.hCursor       = LoadCursor(NULL, IDC_ARROW);
  39.    wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
  40.    wc.lpszMenuName  = lpszAppName;              
  41.    wc.lpszClassName = lpszAppName;              
  43.    if ( IS_WIN95 )
  44.    {
  45.       if ( !RegisterWin95( &wc ) )
  46.          return( FALSE );
  47.    }
  48.    else if ( !RegisterClass( &wc ) )
  49.       return( FALSE );
  51.    hInst = hInstance; 
  53.    // Create the main application window.
  54.    //....................................
  55.    hWnd = CreateWindow( lpszAppName, 
  56.                         lpszTitle,    
  57.                         WS_OVERLAPPEDWINDOW, 
  58.                         CW_USEDEFAULT, 0, 
  59.                         CW_USEDEFAULT, 0,  
  60.                         NULL,              
  61.                         NULL,              
  62.                         hInstance,         
  63.                         NULL               
  64.                       );
  66.    if ( !hWnd ) 
  67.       return( FALSE );
  69.    ShowWindow( hWnd, nCmdShow ); 
  70.    UpdateWindow( hWnd );         
  72.    while( GetMessage( &msg, NULL, 0, 0) )   
  73.    {
  74.       TranslateMessage( &msg ); 
  75.       DispatchMessage( &msg );  
  76.    }
  78.    return( msg.wParam ); 
  79. }
  82. BOOL RegisterWin95( CONST WNDCLASS* lpwc )
  83. {
  84.    WNDCLASSEX wcex;
  86.    wcex.style         = lpwc->style;
  87.    wcex.lpfnWndProc   = lpwc->lpfnWndProc;
  88.    wcex.cbClsExtra    = lpwc->cbClsExtra;
  89.    wcex.cbWndExtra    = lpwc->cbWndExtra;
  90.    wcex.hInstance     = lpwc->hInstance;
  91.    wcex.hIcon         = lpwc->hIcon;
  92.    wcex.hCursor       = lpwc->hCursor;
  93.    wcex.hbrBackground = lpwc->hbrBackground;
  94.    wcex.lpszMenuName  = lpwc->lpszMenuName;
  95.    wcex.lpszClassName = lpwc->lpszClassName;
  97.    // Added elements for Windows 95.
  98.    //...............................
  99.    wcex.cbSize = sizeof(WNDCLASSEX);
  100.    wcex.hIconSm = LoadImage(wcex.hInstance, lpwc->lpszClassName, 
  101.                             IMAGE_ICON, 16, 16,
  102.                             LR_DEFAULTCOLOR );
  104.    return RegisterClassEx( &wcex );
  105. }
  107. LRESULT CALLBACK WndProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
  108. {
  109. static HENHMETAFILE hMetaFile = NULL;
  111.    switch( uMsg )
  112.    {
  113.       case WM_CREATE  : 
  114.               {
  115.                  HDC  hMetaDC;
  116.                  HDC  hRefDC;
  117.                  RECT rect;
  118.                  int  iWidthMM, iHeightMM, iWidthPels, iHeightPels;
  119.                  int  iMMPerPelX, iMMPerPelY;
  121.                  hRefDC = GetDC( hWnd );
  123.                  // Compute the size of the client area in 0.01 mm.
  124.                  //................................................
  125.                  iWidthMM    = GetDeviceCaps(hRefDC, HORZSIZE);
  126.                  iHeightMM   = GetDeviceCaps(hRefDC, VERTSIZE);
  127.                  iWidthPels  = GetDeviceCaps(hRefDC, HORZRES);
  128.                  iHeightPels = GetDeviceCaps(hRefDC, VERTRES);
  130.                  iMMPerPelX = (iWidthMM * 100)/iWidthPels;
  131.                  iMMPerPelY = (iHeightMM * 100)/iHeightPels;
  133.                  GetClientRect(hWnd, &rect);
  135.                  rect.right = rect.right * iMMPerPelX;
  136.                  rect.bottom = rect.bottom * iMMPerPelY;
  137.       
  138.                  // Create an enhanced metafile.
  139.                  //.............................
  140.                  hMetaDC = CreateEnhMetaFile( hRefDC, NULL, &rect, 
  141.                                               "Test Metafile" );
  143.                  // Draw on the metafile.
  144.                  //......................
  145.                  if ( hMetaDC )
  146.                  {
  147.                     HBRUSH hBrush;
  149.                     GdiComment( hMetaDC, 23, "This is for an example." );
  150.                     hBrush = CreateHatchBrush( HS_DIAGCROSS, RGB(0, 0, 255) );
  152.                     SelectObject( hMetaDC, hBrush );
  153.                     Rectangle( hMetaDC, 10, 10, 200, 200 );
  155.                     hMetaFile = CloseEnhMetaFile( hMetaDC );
  156.                     DeleteObject( hBrush );
  157.                  }
  158.                
  159.                  ReleaseDC( hWnd, hRefDC );
  160.               }
  161.               break;
  163.       case WM_PAINT   : 
  164.               {
  165.                  PAINTSTRUCT ps;
  166.                  RECT        rect;
  168.                  BeginPaint( hWnd, &ps );
  170.                  GetClientRect( hWnd, &rect );
  171.                  PlayEnhMetaFile( ps.hdc, hMetaFile, &rect );
  173.                  EndPaint( hWnd, &ps );
  174.               }
  175.               break;
  177.       case WM_COMMAND :
  178.               switch( LOWORD( wParam ) )
  179.               {
  180.                  case IDM_ABOUT :
  181.                         DialogBox( hInst, "AboutBox", hWnd, (DLGPROC)About );
  182.                         break;
  184.                  case IDM_EXIT :
  185.                         DestroyWindow( hWnd );
  186.                         break;
  187.               }
  188.               break;
  189.       
  190.       case WM_DESTROY :
  191.               DeleteEnhMetaFile( hMetaFile );
  192.               PostQuitMessage(0);
  193.               break;
  195.       default :
  196.             return( DefWindowProc( hWnd, uMsg, wParam, lParam ) );
  197.    }
  199.    return( 0L );
  200. }
  203. LRESULT CALLBACK About( HWND hDlg,           
  204.                         UINT message,        
  205.                         WPARAM wParam,       
  206.                         LPARAM lParam)
  207. {
  208.    switch (message) 
  209.    {
  210.        case WM_INITDIALOG: 
  211.                return (TRUE);
  213.        case WM_COMMAND:                              
  214.                if (   LOWORD(wParam) == IDOK         
  215.                    || LOWORD(wParam) == IDCANCEL)    
  216.                {
  217.                        EndDialog(hDlg, TRUE);        
  218.                        return (TRUE);
  219.                }
  220.                break;
  221.    }
  223.    return (FALSE); 
  224. }