From 84d5992357decd85557e905fb1574b4ce4e57e9e Mon Sep 17 00:00:00 2001
From: Johan Dahlin <jdahlin@async.com.br>
Date: Mon, 11 Aug 2003 18:41:52 +0000
Subject: [PATCH] Make sure winhelp doesn't scroll outside of its display area.

---
 programs/winhelp/winhelp.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/programs/winhelp/winhelp.c b/programs/winhelp/winhelp.c
index 623f8741658..6494d872cf1 100644
--- a/programs/winhelp/winhelp.c
+++ b/programs/winhelp/winhelp.c
@@ -814,6 +814,8 @@ static LRESULT CALLBACK WINHELP_TextWndProc(HWND hWnd, UINT msg, WPARAM wParam,
 	RECT  rect;
 	INT   Min, Max;
 	INT   CurPos = GetScrollPos(hWnd, SB_VERT);
+	INT   dy;
+	
 	GetScrollRange(hWnd, SB_VERT, &Min, &Max);
 	GetClientRect(hWnd, &rect);
 
@@ -831,7 +833,11 @@ static LRESULT CALLBACK WINHELP_TextWndProc(HWND hWnd, UINT msg, WPARAM wParam,
         }
 	if (update)
         {
-	    INT dy = GetScrollPos(hWnd, SB_VERT) - CurPos;
+	    if (CurPos > Max)
+                CurPos = Max;
+	    else if (CurPos < Min)
+                CurPos = Min;		    
+	    dy = GetScrollPos(hWnd, SB_VERT) - CurPos;
 	    SetScrollPos(hWnd, SB_VERT, CurPos, TRUE);
 	    ScrollWindow(hWnd, 0, dy, NULL, NULL);
 	    UpdateWindow(hWnd);