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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 / chooseco.c next >
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C/C++ Source or Header  |  1996-03-06  |  6.5 KB  |  216 lines
  1.  
  2. #include <windows.h>  
  3. #include "chooseco.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   = "ChooseColor()"; 
  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. #define CUSTCOLORS 16
  106.  
  107. LRESULT CALLBACK WndProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
  108. {
  109. static DWORD dwCustColors[CUSTCOLORS];
  110. static DWORD dwColor = 0;
  111.  
  112.    switch( uMsg )
  113.    {
  114.       case WM_CREATE :
  115.               // Default the colors to white.
  116.               //.............................
  117.               memset( dwCustColors, 255, sizeof( DWORD )*CUSTCOLORS );
  118.               break;
  119.  
  120.       case WM_PAINT :
  121.               {
  122.                  PAINTSTRUCT ps;
  123.                  HBRUSH      hBrush;
  124.                  RECT        rect;
  125.  
  126.                  // Get the client rect and create a brush.
  127.                  //........................................                                 
  128.                  GetClientRect( hWnd, &rect );
  129.                  hBrush = CreateSolidBrush( dwColor );
  130.  
  131.                  // Paint the client area of the window.
  132.                  //.....................................
  133.                  BeginPaint( hWnd, &ps );
  134.                  FillRect( ps.hdc, &rect, hBrush );
  135.                  EndPaint( hWnd, &ps );
  136.  
  137.                  // Delete the brush.
  138.                  //..................
  139.                  DeleteObject( hBrush );
  140.               }
  141.               break;
  142.  
  143.       case WM_COMMAND :
  144.               switch( LOWORD( wParam ) )
  145.               {
  146.                  case IDM_TEST :
  147.                         {
  148.                            CHOOSECOLOR cc;
  149.  
  150.                            // Initialize the CHOOSECOLOR structure.
  151.                            //......................................
  152.                            memset( &cc, 0, sizeof( CHOOSECOLOR ) );
  153.                            cc.lStructSize  = sizeof( CHOOSECOLOR );
  154.                            cc.hwndOwner    = hWnd;
  155.                            cc.lpCustColors = dwCustColors;
  156.                            cc.rgbResult    = dwColor;
  157.                            cc.Flags        = CC_RGBINIT;
  158.  
  159.                            // Create the choose color dialog.
  160.                            //................................
  161.                            if ( ChooseColor( &cc ) )
  162.                            {
  163.                               // If the user chooses a color,
  164.                               // set the selected color as the new color.
  165.                               //.........................................
  166.                               dwColor = cc.rgbResult;
  167.                               InvalidateRect( hWnd, NULL, TRUE );
  168.                            }
  169.                         }
  170.                         break;
  171.  
  172.                  case IDM_ABOUT :
  173.                         DialogBox( hInst, "AboutBox", hWnd, (DLGPROC)About );
  174.                         break;
  175.  
  176.                  case IDM_EXIT :
  177.                         DestroyWindow( hWnd );
  178.                         break;
  179.               }
  180.               break;
  181.  
  182.       case WM_DESTROY :
  183.               PostQuitMessage(0);
  184.               break;
  185.  
  186.       default :
  187.             return( DefWindowProc( hWnd, uMsg, wParam, lParam ) );
  188.    }
  189.  
  190.    return( 0L );
  191. }
  192.  
  193.  
  194. LRESULT CALLBACK About( HWND hDlg,           
  195.                         UINT message,        
  196.                         WPARAM wParam,       
  197.                         LPARAM lParam)
  198. {
  199.    switch (message) 
  200.    {
  201.        case WM_INITDIALOG: 
  202.                return (TRUE);
  203.  
  204.        case WM_COMMAND:                              
  205.                if (   LOWORD(wParam) == IDOK         
  206.                    || LOWORD(wParam) == IDCANCEL)    
  207.                {
  208.                        EndDialog(hDlg, TRUE);        
  209.                        return (TRUE);
  210.                }
  211.                break;
  212.    }
  213.  
  214.    return (FALSE); 
  215. }
  216.