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Make sure winhelp doesn't scroll outside of its display area.
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49b408b192
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@ -814,6 +814,8 @@ static LRESULT CALLBACK WINHELP_TextWndProc(HWND hWnd, UINT msg, WPARAM wParam,
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RECT rect;
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INT Min, Max;
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INT CurPos = GetScrollPos(hWnd, SB_VERT);
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INT dy;
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GetScrollRange(hWnd, SB_VERT, &Min, &Max);
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GetClientRect(hWnd, &rect);
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@ -831,7 +833,11 @@ static LRESULT CALLBACK WINHELP_TextWndProc(HWND hWnd, UINT msg, WPARAM wParam,
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}
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if (update)
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{
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INT dy = GetScrollPos(hWnd, SB_VERT) - CurPos;
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if (CurPos > Max)
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CurPos = Max;
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else if (CurPos < Min)
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CurPos = Min;
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dy = GetScrollPos(hWnd, SB_VERT) - CurPos;
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SetScrollPos(hWnd, SB_VERT, CurPos, TRUE);
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ScrollWindow(hWnd, 0, dy, NULL, NULL);
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UpdateWindow(hWnd);
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