diff --git a/objects/region.c b/objects/region.c
index 52e9654953e..04e2bc5e229 100644
--- a/objects/region.c
+++ b/objects/region.c
@@ -1190,8 +1190,15 @@ BOOL REGION_LPTODP( HDC hdc, HRGN hDest, HRGN hSrc )
 	tmpRect.top = YLPTODP( dc, tmpRect.top );
 	tmpRect.right = XLPTODP( dc, tmpRect.right );
 	tmpRect.bottom = YLPTODP( dc, tmpRect.bottom );
+
+        if (tmpRect.left > tmpRect.right) 
+        { INT tmp = tmpRect.left; tmpRect.left = tmpRect.right; tmpRect.right = tmp; }
+        if (tmpRect.top > tmpRect.bottom) 
+        { INT tmp = tmpRect.top; tmpRect.top = tmpRect.bottom; tmpRect.bottom = tmp; }
+
 	REGION_UnionRectWithRegion( &tmpRect, destObj->rgn );
     }
+    ret = TRUE;
     
     GDI_ReleaseObj( hDest );
     GDI_ReleaseObj( hSrc );
diff --git a/windows/painting.c b/windows/painting.c
index 5578add6a8c..1fbaeb7cddf 100644
--- a/windows/painting.c
+++ b/windows/painting.c
@@ -354,13 +354,13 @@ HDC WINAPI BeginPaint( HWND hwnd, PAINTSTRUCT *lps )
        than the window itself, so we need to intersect the cliprect with
        the window  */
     
-    GetClipBox( lps->hdc, &clipRect );
     GetClientRect( hwnd, &clientRect );
 
-    /* The rect obtained by GetClipBox is in logical, so make the client in logical to*/
-    DPtoLP(lps->hdc, (LPPOINT)&clientRect, 2);    
+    GetClipBox( lps->hdc, &clipRect );
+    LPtoDP(lps->hdc, (LPPOINT)&clipRect, 2);      /* GetClipBox returns LP */
 
     IntersectRect(&lps->rcPaint, &clientRect, &clipRect);
+    DPtoLP(lps->hdc, (LPPOINT)&lps->rcPaint, 2);  /* we must return LP */
 
     TRACE("box = (%i,%i - %i,%i)\n", lps->rcPaint.left, lps->rcPaint.top,
 		    lps->rcPaint.right, lps->rcPaint.bottom );
diff --git a/windows/scroll.c b/windows/scroll.c
index 4eb17607fe2..2cabfbf2b35 100644
--- a/windows/scroll.c
+++ b/windows/scroll.c
@@ -97,18 +97,27 @@ BOOL WINAPI ScrollDC( HDC hdc, INT dx, INT dy, const RECT *rc,
 	  dc->wndOrgY, dc->wndExtY, dc->vportOrgY, dc->vportExtY );
 */
 
-    /* compute device clipping region */
+    /* compute device clipping region (in device coordinates) */
 
     if ( rc )
 	rect = *rc;
     else /* maybe we should just return FALSE? */
 	GetClipBox( hdc, &rect );
 
+    LPtoDP( hdc, (LPPOINT)&rect, 2 );
+
     if (prLClip)
-	IntersectRect( &rClip,&rect,prLClip );
+    {
+        rClip = *prLClip;
+        LPtoDP( hdc, (LPPOINT)&rClip, 2 );
+	IntersectRect( &rClip, &rect, &rClip );
+    }
     else
         rClip = rect;
 
+    dx = XLPTODP ( dc, rect.left + dx ) - XLPTODP ( dc, rect.left );
+    dy = YLPTODP ( dc, rect.top + dy ) - YLPTODP ( dc, rect.top );
+
     rSrc = rClip;
     OffsetRect( &rSrc, -dx, -dy );
     IntersectRect( &rSrc, &rSrc, &rect );
@@ -121,6 +130,10 @@ BOOL WINAPI ScrollDC( HDC hdc, INT dx, INT dy, const RECT *rc,
             dest.y = (src.y = rSrc.top) + dy;
 
             /* copy bits */
+    
+            DPtoLP( hdc, (LPPOINT)&rSrc, 2 );
+            DPtoLP( hdc, &src, 1 );
+            DPtoLP( hdc, &dest, 1 );
 
             if (!BitBlt( hdc, dest.x, dest.y,
                            rSrc.right - rSrc.left, rSrc.bottom - rSrc.top,
@@ -139,10 +152,6 @@ BOOL WINAPI ScrollDC( HDC hdc, INT dx, INT dy, const RECT *rc,
               (hrgnUpdate) ? hrgnUpdate : CreateRectRgn( 0,0,0,0 );
             HRGN hrgn2;
 
-            dx = XLPTODP ( dc, rect.left + dx) - XLPTODP ( dc, rect.left);
-            dy = YLPTODP ( dc, rect.top + dy) - YLPTODP ( dc, rect.top);
-            LPtoDP( hdc, (LPPOINT)&rect, 2 );
-            LPtoDP( hdc, (LPPOINT)&rClip, 2 );
             hrgn2 = CreateRectRgnIndirect( &rect );
             OffsetRgn( hrgn2, dc->w.DCOrgX, dc->w.DCOrgY );
             CombineRgn( hrgn2, hrgn2, dc->w.hVisRgn, RGN_AND );