From 06f3c048a6d923a2d15c473d3c780ee641836ea7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Przemys=C5=82aw=20Czerpak?= <druzus@poczta.onet.pl>
Date: Tue, 30 Apr 2013 08:56:57 +0200
Subject: [PATCH] 2013-04-30 08:56 UTC+0200 Przemyslaw Czerpak
 (druzus/at/poczta.onet.pl)   * contrib/hbct/ctwin.c     ! added protection
 against GPF when reverted coordinates are used       in WOPEN()

---
 ChangeLog.txt        |  5 +++++
 contrib/hbct/ctwin.c | 14 +++++++++-----
 2 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/ChangeLog.txt b/ChangeLog.txt
index eb3715eff5..4c4d880a88 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -10,6 +10,11 @@
      * Change, ! Fix, % Optimization, + Addition, - Removal, ; Comment
  */
 
+2013-04-30 08:56 UTC+0200 Przemyslaw Czerpak (druzus/at/poczta.onet.pl)
+  * contrib/hbct/ctwin.c
+    ! added protection against GPF when reverted coordinates are used
+      in WOPEN()
+
 2013-04-30 02:53 UTC+0200 Przemyslaw Czerpak (druzus/at/poczta.onet.pl)
   * contrib/gtqtc/gtqtc1.cpp
     ! reverted HB_GTI_DISPIMAGE cords
diff --git a/contrib/hbct/ctwin.c b/contrib/hbct/ctwin.c
index b6cde20af7..6654db738d 100644
--- a/contrib/hbct/ctwin.c
+++ b/contrib/hbct/ctwin.c
@@ -2474,13 +2474,17 @@ int  hb_ctwSetBorderMode( int iTop, int iLeft, int iBottom, int iRight )
 int  hb_ctwCreateWindow( int iTop, int iLeft, int iBottom, int iRight, HB_BOOL fClear, int iColor, HB_BOOL fVisible )
 {
    int iResult = -1;
-   PHB_GTCTW pCTW = hb_ctw_base();
 
-   if( pCTW )
+   if( iTop <= iBottom && iLeft <= iRight )
    {
-      iResult = hb_ctw_CreateWindow( pCTW, iTop, iLeft, iBottom, iRight, fClear, iColor, fVisible );
-      HB_GTSELF_FLUSH( pCTW->pGT );
-      hb_gt_BaseFree( pCTW->pGT );
+      PHB_GTCTW pCTW = hb_ctw_base();
+
+      if( pCTW )
+      {
+         iResult = hb_ctw_CreateWindow( pCTW, iTop, iLeft, iBottom, iRight, fClear, iColor, fVisible );
+         HB_GTSELF_FLUSH( pCTW->pGT );
+         hb_gt_BaseFree( pCTW->pGT );
+      }
    }
    return iResult;
 }