home *** CD-ROM | disk | FTP | other *** search
- /*-----------------------------------------------------------
- SHOWBIT.C -- Shows bitmaps in BITLIB dynamic link library
- (c) Charles Petzold, 1990
- -----------------------------------------------------------*/
-
- #include <windows.h>
-
- long FAR PASCAL WndProc (HWND, WORD, WORD, LONG) ;
-
- int PASCAL WinMain (HANDLE hInstance, HANDLE hPrevInstance,
- LPSTR lpszCmdLine, int nCmdShow)
- {
- static char szAppName [] = "ShowBit" ;
- HWND hwnd ;
- MSG msg ;
- WNDCLASS wndclass ;
-
- if (!hPrevInstance)
- {
- wndclass.style = CS_HREDRAW | CS_VREDRAW ;
- wndclass.lpfnWndProc = WndProc ;
- wndclass.cbClsExtra = 0 ;
- wndclass.cbWndExtra = 0 ;
- wndclass.hInstance = hInstance ;
- wndclass.hIcon = NULL ;
- wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
- wndclass.hbrBackground = GetStockObject (WHITE_BRUSH) ;
- wndclass.lpszMenuName = NULL ;
- wndclass.lpszClassName = szAppName ;
-
- RegisterClass (&wndclass) ;
- }
-
- hwnd = CreateWindow (szAppName, "Show Bitmaps from BITLIB (Press Key)",
- WS_OVERLAPPEDWINDOW,
- CW_USEDEFAULT, CW_USEDEFAULT,
- CW_USEDEFAULT, CW_USEDEFAULT,
- NULL, NULL, hInstance, NULL) ;
-
- ShowWindow (hwnd, nCmdShow) ;
- UpdateWindow (hwnd) ;
-
- while (GetMessage (&msg, NULL, 0, 0))
- {
- TranslateMessage (&msg) ;
- DispatchMessage (&msg) ;
- }
- return msg.wParam ;
- }
-
- void DrawBitmap (HDC hdc, short xStart, short yStart, HBITMAP hBitmap)
- {
- BITMAP bm ;
- DWORD dwSize ;
- HDC hMemDC ;
- POINT pt ;
-
- hMemDC = CreateCompatibleDC (hdc) ;
- SelectObject (hMemDC, hBitmap) ;
- GetObject (hBitmap, sizeof (BITMAP), (LPSTR) &bm) ;
- pt.x = bm.bmWidth ;
- pt.y = bm.bmHeight ;
-
- BitBlt (hdc, xStart, yStart, pt.x, pt.y, hMemDC, 0, 0, SRCCOPY) ;
-
- DeleteDC (hMemDC) ;
- }
-
- long FAR PASCAL WndProc (HWND hwnd, WORD message, WORD wParam, LONG lParam)
- {
- static HANDLE hLibrary ;
- static short nCurrent = 1 ;
- HANDLE hBitmap ;
- HDC hdc ;
- PAINTSTRUCT ps ;
-
- switch (message)
- {
- case WM_CREATE:
- if ((hLibrary = LoadLibrary ("BITLIB.DLL")) < 32)
- MessageBeep (0) ;
-
- return 0 ;
-
- case WM_CHAR:
- if (hLibrary >= 32)
- {
- nCurrent ++ ;
- InvalidateRect (hwnd, NULL, TRUE) ;
- }
- return 0 ;
-
- case WM_PAINT:
- hdc = BeginPaint (hwnd, &ps) ;
-
- if (hLibrary >= 32)
- {
- if (NULL == (hBitmap = LoadBitmap (hLibrary,
- MAKEINTRESOURCE (nCurrent))))
- {
- nCurrent = 1 ;
- hBitmap = LoadBitmap (hLibrary,
- MAKEINTRESOURCE (nCurrent)) ;
- }
-
- if (hBitmap)
- DrawBitmap (hdc, 0, 0, hBitmap) ;
- }
-
- EndPaint (hwnd, &ps) ;
- return 0 ;
-
- case WM_DESTROY:
- if (hLibrary >= 32)
- FreeLibrary (hLibrary) ;
-
- PostQuitMessage (0) ;
- return 0 ;
- }
- return DefWindowProc (hwnd, message, wParam, lParam) ;
- }
-