TEXT ("Get System Metrics No. 2"), WS_OVERLAPPEDWINDOW | WS_VSCROLL, 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, cyClient, iVscrollPos ; HDC hdc ; int i, y ; PAINTSTRUCT ps ; TCHAR szBuffer[10] ; 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) ; SetScrollRange (hwnd, SB_VERT, 0, NUMLINES - 1, FALSE) ; SetScrollPos (hwnd, SB_VERT, iVscrollPos, TRUE) ; return 0 ;
case WM_SIZE: cyClient = HIWORD (lParam) ; return 0 ;
case WM_VSCROLL: switch (LOWORD (wParam)) { case SB_LINEUP: iVscrollPos -= 1 ; break ; case SB_LINEDOWN: iVscrollPos += 1 ; break ;
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