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- /*-----------------------------------------------------------
- SHOWBIT.C -- Shows bitmaps in BITLIB dynamic link library
- (c) Charles Petzold, 1996
- -----------------------------------------------------------*/
-
- #include <windows.h>
-
- LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
-
- int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
- PSTR szCmdLine, int iCmdShow)
- {
- static char szAppName[] = "ShowBit" ;
- HWND hwnd ;
- MSG msg ;
- WNDCLASSEX wndclass ;
-
- wndclass.cbSize = sizeof (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 ;
- wndclass.hIconSm = LoadIcon (NULL, IDI_APPLICATION) ;
-
- RegisterClassEx (&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, iCmdShow) ;
- UpdateWindow (hwnd) ;
-
- while (GetMessage (&msg, NULL, 0, 0))
- {
- TranslateMessage (&msg) ;
- DispatchMessage (&msg) ;
- }
- return msg.wParam ;
- }
-
- void DrawBitmap (HDC hdc, int xStart, int yStart, HBITMAP hBitmap)
- {
- BITMAP bm ;
- HDC hMemDC ;
- POINT pt ;
-
- hMemDC = CreateCompatibleDC (hdc) ;
- SelectObject (hMemDC, hBitmap) ;
- GetObject (hBitmap, sizeof (BITMAP), (PSTR) &bm) ;
- pt.x = bm.bmWidth ;
- pt.y = bm.bmHeight ;
-
- BitBlt (hdc, xStart, yStart, pt.x, pt.y, hMemDC, 0, 0, SRCCOPY) ;
-
- DeleteDC (hMemDC) ;
- }
-
- LRESULT CALLBACK WndProc (HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
- {
- static HINSTANCE hLibrary ;
- static int iCurrent = 1 ;
- HBITMAP hBitmap ;
- HDC hdc ;
- PAINTSTRUCT ps ;
-
- switch (iMsg)
- {
- case WM_CREATE :
- if ((hLibrary = LoadLibrary ("BITLIB.DLL")) == NULL)
- DestroyWindow (hwnd) ;
-
- return 0 ;
-
- case WM_CHAR :
- if (hLibrary)
- {
- iCurrent ++ ;
- InvalidateRect (hwnd, NULL, TRUE) ;
- }
- return 0 ;
-
- case WM_PAINT :
- hdc = BeginPaint (hwnd, &ps) ;
-
- if (hLibrary)
- {
- if (NULL == (hBitmap = LoadBitmap (hLibrary,
- MAKEINTRESOURCE (iCurrent))))
- {
- iCurrent = 1 ;
- hBitmap = LoadBitmap (hLibrary,
- MAKEINTRESOURCE (iCurrent)) ;
- }
-
- if (hBitmap)
- {
- DrawBitmap (hdc, 0, 0, hBitmap) ;
- DeleteObject (hBitmap) ;
- }
- }
-
- EndPaint (hwnd, &ps) ;
- return 0 ;
-
- case WM_DESTROY :
- if (hLibrary)
- FreeLibrary (hLibrary) ;
-
- PostQuitMessage (0) ;
- return 0 ;
- }
- return DefWindowProc (hwnd, iMsg, wParam, lParam) ;
- }
-