From 409cae2c080295dc4b0e87af76da8ff7e3206ff7 Mon Sep 17 00:00:00 2001
From: Edgar Simo <bobbens@gmail.com>
Date: Fri, 12 Dec 2008 15:51:57 +0000
Subject: [PATCH] Some error checking when destroying the HelperWindow.

---
 src/video/win32/SDL_win32window.c | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/src/video/win32/SDL_win32window.c b/src/video/win32/SDL_win32window.c
index a5ab18780..f7b7deb49 100644
--- a/src/video/win32/SDL_win32window.c
+++ b/src/video/win32/SDL_win32window.c
@@ -522,15 +522,25 @@ SDL_HelperWindowCreate(void)
 void
 SDL_HelperWindowDestroy(void)
 {
+    HINSTANCE hInstance = GetModuleHandleA(NULL);
+
     /* Destroy the window. */
-    if (SDL_HelperWindow) {
-        DestroyWindow(SDL_HelperWindow);
+    if (SDL_HelperWindow != NULL) {
+        if (DestroyWindow(SDL_HelperWindow) == 0) {
+           SDL_SetError("Unable to destroy Helper Window: error %d.",
+                        GetLastError());
+           return;
+        }
         SDL_HelperWindow = NULL;
     }
 
     /* Unregister the class. */
-    if (SDL_HelperWindowClass) {
-        UnregisterClass(SDL_HelperWindowClassName, GetModuleHandleA(NULL));
+    if (SDL_HelperWindowClass != 0) {
+        if ((UnregisterClass(SDL_HelperWindowClassName, hInstance)) == 0) {
+           SDL_SetError("Unable to destroy Helper Window Class: error %d.",
+                        GetLastError());
+           return;
+        }
         SDL_HelperWindowClass = 0;
     }
 }