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/ Windows 95 API Bible / Windows 95 API Bible 3 Disc Set.iso / Win32 API Bible Book 2 of 3.iso / chapter2 / getopen.c < prev    next >
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C/C++ Source or Header  |  1996-03-06  |  5.9 KB  |  204 lines
  1.  
  2. #include <windows.h>  
  3. #include "getopen.h"  
  4.  
  5.  
  6. #if defined (WIN32)
  7.     #define IS_WIN32 TRUE
  8. #else
  9.     #define IS_WIN32 FALSE
  10. #endif
  11.  
  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
  15.  
  16. HINSTANCE hInst;   // current instance
  17.  
  18. LPCTSTR lpszAppName = "MyApp";
  19. LPCTSTR lpszTitle   = "GetOpenFileName()"; 
  20.  
  21.  
  22. BOOL RegisterWin95( CONST WNDCLASS* lpwc );
  23.  
  24.  
  25. int APIENTRY WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance,
  26.                       LPTSTR lpCmdLine, int nCmdShow)
  27. {
  28.    MSG      msg;
  29.    HWND     hWnd; 
  30.    WNDCLASS wc;
  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;              
  42.  
  43.    if ( IS_WIN95 )
  44.    {
  45.       if ( !RegisterWin95( &wc ) )
  46.          return( FALSE );
  47.    }
  48.    else if ( !RegisterClass( &wc ) )
  49.       return( FALSE );
  50.  
  51.    hInst = hInstance; 
  52.  
  53.    hWnd = CreateWindow( lpszAppName, 
  54.                         lpszTitle,    
  55.                         WS_OVERLAPPEDWINDOW, 
  56.                         CW_USEDEFAULT, 0, 
  57.                         CW_USEDEFAULT, 0,  
  58.                         NULL,              
  59.                         NULL,              
  60.                         hInstance,         
  61.                         NULL               
  62.                       );
  63.  
  64.    if ( !hWnd ) 
  65.       return( FALSE );
  66.  
  67.    ShowWindow( hWnd, nCmdShow ); 
  68.    UpdateWindow( hWnd );         
  69.  
  70.    while( GetMessage( &msg, NULL, 0, 0) )   
  71.    {
  72.       TranslateMessage( &msg ); 
  73.       DispatchMessage( &msg );  
  74.    }
  75.  
  76.    return( msg.wParam ); 
  77. }
  78.  
  79.  
  80. BOOL RegisterWin95( CONST WNDCLASS* lpwc )
  81. {
  82.    WNDCLASSEX wcex;
  83.  
  84.    wcex.style         = lpwc->style;
  85.    wcex.lpfnWndProc   = lpwc->lpfnWndProc;
  86.    wcex.cbClsExtra    = lpwc->cbClsExtra;
  87.    wcex.cbWndExtra    = lpwc->cbWndExtra;
  88.    wcex.hInstance     = lpwc->hInstance;
  89.    wcex.hIcon         = lpwc->hIcon;
  90.    wcex.hCursor       = lpwc->hCursor;
  91.    wcex.hbrBackground = lpwc->hbrBackground;
  92.    wcex.lpszMenuName  = lpwc->lpszMenuName;
  93.    wcex.lpszClassName = lpwc->lpszClassName;
  94.  
  95.    // Added elements for Windows 95.
  96.    //...............................
  97.    wcex.cbSize = sizeof(WNDCLASSEX);
  98.    wcex.hIconSm = LoadImage(wcex.hInstance, lpwc->lpszClassName, 
  99.                             IMAGE_ICON, 16, 16,
  100.                             LR_DEFAULTCOLOR );
  101.             
  102.    return RegisterClassEx( &wcex );
  103. }
  104.  
  105.  
  106. LRESULT CALLBACK WndProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
  107. {
  108. static char szFileName[MAX_PATH];
  109.  
  110.    switch( uMsg )
  111.    {
  112.       case WM_CREATE :
  113.               memset( szFileName, 0, sizeof( szFileName ) );
  114.               break;
  115.  
  116.       case WM_PAINT :
  117.               {
  118.                  PAINTSTRUCT ps;
  119.                  char        szTitle[128];
  120.  
  121.                  // Display the file name.
  122.                  //.......................
  123.                  BeginPaint( hWnd, &ps );
  124.  
  125.                  if ( szFileName[0] )
  126.                  {
  127.                     GetFileTitle( szFileName, szTitle, sizeof( szTitle ) );
  128.                     TextOut( ps.hdc, 10, 10, szTitle, strlen( szTitle ) );
  129.                  }
  130.  
  131.                  EndPaint( hWnd, &ps );
  132.               }
  133.               break;
  134.  
  135.       case WM_COMMAND :
  136.               switch( LOWORD( wParam ) )
  137.               {
  138.                  case IDM_OPENFILE :
  139.                         {
  140.                            OPENFILENAME ofn;
  141.  
  142.                            // Initialize the OPENFILENAME structure.
  143.                            //.......................................
  144.                            memset( &ofn, 0, sizeof( OPENFILENAME ) );
  145.                            ofn.lStructSize  = sizeof( OPENFILENAME );
  146.                            ofn.hwndOwner    = hWnd;
  147.                            ofn.lpstrFilter  = "Text files {*.txt}\0*.txt\0All files {*.*}\0*.*\0\0";
  148.                            ofn.lpstrFile    = szFileName;
  149.                            ofn.nMaxFile     = MAX_PATH;
  150.                            ofn.Flags        = OFN_FILEMUSTEXIST;
  151.                            ofn.lpstrDefExt  = "txt";
  152.  
  153.                            // Create the open file dialog.
  154.                            //.............................
  155.                            if ( GetOpenFileName( &ofn ) )
  156.                               InvalidateRect( hWnd, NULL, TRUE );
  157.                         }
  158.                         break;
  159.  
  160.                  case IDM_ABOUT :
  161.                         DialogBox( hInst, "AboutBox", hWnd, (DLGPROC)About );
  162.                         break;
  163.  
  164.                  case IDM_EXIT :
  165.                         DestroyWindow( hWnd );
  166.                         break;
  167.               }
  168.               break;
  169.  
  170.       case WM_DESTROY :
  171.               PostQuitMessage(0);
  172.               break;
  173.  
  174.       default :
  175.             return( DefWindowProc( hWnd, uMsg, wParam, lParam ) );
  176.    }
  177.  
  178.    return( 0L );
  179. }
  180.  
  181.  
  182. LRESULT CALLBACK About( HWND hDlg,           
  183.                         UINT message,        
  184.                         WPARAM wParam,       
  185.                         LPARAM lParam)
  186. {
  187.    switch (message) 
  188.    {
  189.        case WM_INITDIALOG: 
  190.                return (TRUE);
  191.  
  192.        case WM_COMMAND:                              
  193.                if (   LOWORD(wParam) == IDOK         
  194.                    || LOWORD(wParam) == IDCANCEL)    
  195.                {
  196.                        EndDialog(hDlg, TRUE);        
  197.                        return (TRUE);
  198.                }
  199.                break;
  200.    }
  201.  
  202.    return (FALSE); 
  203. }
  204.