DEVCAPS1.C        /*------------------------------------------------------------------------          DEVCAPS1.C -- Device Capabilities Display Program No. 1                    (c) Charles Petzold, 1998        ----------------------------------------------------------------------*/        #include <windows.h>        #define NUMLINES ((int) (sizeof devcaps / sizeof devcaps [0]))        struct        {            int    iIndex ;            TCHAR *szLabel ;            TCHAR *szDesc ;        }        devcaps [] =        {            HORZSIZE,     TEXT ("HORZSIZE"),TEXT ("Width in millimeters:"),            VERTSIZE,     TEXT ("VERTSIZE"),TEXT ("Height in millimeters:"),            HORZRES,      TEXT ("HORZRES"),     TEXT ("Width in pixels:"),           VERTRES,      TEXT ("VERTRES"),     TEXT ("Height in raster lines:"),            BITSPIXEL,    TEXT ("BITSPIXEL"),TEXT ("Color bits per pixel:"),            PLANES,       TEXT ("PLANES"),   TEXT ("Number of color planes:"),           NUMBRUSHES,   TEXT ("NUMBRUSHES"),  TEXT ("Number of device brushes:"),            NUMPENS,      TEXT ("NUMPENS"),     TEXT ("Number of device pens:"),           NUMMARKERS,   TEXT ("NUMMARKERS"),  TEXT ("Number of device markers:"),            NUMFONTS,     TEXT ("NUMFONTS"),    TEXT ("Number of device fonts:"),            NUMCOLORS,    TEXT ("NUMCOLORS"),   TEXT ("Number of device colors:"),            PDEVICESIZE,  TEXT ("PDEVICESIZE"),TEXT ("Size of device structure:"),            ASPECTX,      TEXT ("ASPECTX"),     TEXT ("Relative width of pixel:"),            ASPECTY,      TEXT ("ASPECTY"),     TEXT ("Relative height of pixel:"),            ASPECTXY,     TEXT ("ASPECTXY"),    TEXT ("Relative diagonal of pixel:"),            LOGPIXELSX,   TEXT ("LOGPIXELSX"),  TEXT ("Horizontal dots per inch:"),            LOGPIXELSY,   TEXT ("LOGPIXELSY"),  TEXT ("Vertical dots per inch:"),            SIZEPALETTE,  TEXT ("SIZEPALETTE"),TEXT ("Number of palette entries:"),            NUMRESERVED,  TEXT ("NUMRESERVED"),TEXT ("Reserved palette entries:"),            COLORRES,     TEXT ("COLORRES"),    TEXT ("Actual color resolution:")        } ;        LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;        int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,                   PSTR szCmdLine, int iCmdShow)        {            static TCHAR szAppName[] = TEXT ("DevCaps1") ;            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 ("This program requires Windows NT!"),                                                 szAppName, MB_ICONERROR) ;                    return 0 ;            }                       hwnd = CreateWindow (szAppName, TEXT ("Device Capabilities"),                                                 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 int    cxChar, cxCaps, cyChar ;            TCHAR         szBuffer[10] ;            HDC           hdc ;            int           i ;            PAINTSTRUCT   ps ;            TEXTMETRIC    tm ;                       switch (message)            {            case WM_CREATE:                    hdc = GetDC (hwnd) ;                    GetTextMetrics (hdc, &tm) ;                    cxChar= tm.tmAveCharWidth ;                    cxCaps= (tm.tmPitchAndFamily & 1   3 : 2) * cxChar / 2 ;                    cyChar= tm.tmHeight + tm.tmExternalLeading ;                                    ReleaseDC (hwnd, hdc) ;                    return 0 ;                            case WM_PAINT:                    hdc = BeginPaint (hwnd, &ps) ;                    for (i = 0 ; i < NUMLINES ; i++)                    {                           TextOut (     hdc, 0, cyChar * i,                                   devcaps[i].szLabel,                                   lstrlen (devcaps[i].szLabel)) ;                                                TextOut (     hdc, 14 * cxCaps, cyChar * i,                                   devcaps[i].szDesc,                                   lstrlen (devcaps[i].szDesc)) ;                                                SetTextAlign (hdc, TA_RIGHT | TA_TOP) ;                           TextOut (hdc, 14*cxCaps+35*cxChar, cyChar*i, szBuffer,                                   wsprintf (szBuffer, TEXT ("%5d"),                                   GetDeviceCaps (hdc, devcaps[i].iIndex))) ;                                         SetTextAlign (hdc, TA_LEFT | TA_TOP) ;                    }                                    EndPaint (hwnd, &ps) ;                    return 0 ;                           case WM_DESTROY:                    PostQuitMessage (0) ;                    return 0 ;            }            return DefWindowProc (hwnd, message, wParam, lParam) ;        }