QVXCY.rar_界面编程_C/C++_

/*----------------------------------------- CLIPVIEW.C -- Simple Clipboard Viewer (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[] = "ClipView" ; 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 = NULL ; 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, "Simple Clipboard Viewer (Text Only)", 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 iMsg, WPARAM wParam, LPARAM lParam) { static HWND hwndNextViewer ; HGLOBAL hGMem ; HDC hdc ; PSTR pGMem ; PAINTSTRUCT ps ; RECT rect ; switch (iMsg) { case WM_CREATE : hwndNextViewer = SetClipboardViewer (hwnd) ; return 0 ; case WM_CHANGECBCHAIN : if ((HWND) wParam == hwndNextViewer) hwndNextViewer = (HWND) lParam ; else if (hwndNextViewer) SendMessage (hwndNextViewer, iMsg, wParam, lParam) ; return 0 ; case WM_DRAWCLIPBOARD : if (hwndNextViewer) SendMessage (hwndNextViewer, iMsg, wParam, lParam) ; InvalidateRect (hwnd, NULL, TRUE) ; return 0 ; case WM_PAINT : hdc = BeginPaint (hwnd, &ps) ; GetClientRect (hwnd, &rect) ; OpenClipboard (hwnd) ; hGMem = GetClipboardData (CF_TEXT) ; if (hGMem != NULL) { pGMem = (PSTR) GlobalLock (hGMem) ; DrawText (hdc, pGMem, -1, &rect, DT_EXPANDTABS) ; GlobalUnlock (hGMem) ; } CloseClipboard () ; EndPaint (hwnd, &ps) ; return 0 ; case WM_DESTROY : ChangeClipboardChain (hwnd, hwndNextViewer) ; PostQuitMessage (0) ; return 0 ; } return DefWindowProc (hwnd, iMsg, wParam, lParam) ; }