[fireball] 25129: ChangeDisplaySettingsEx() can be called with NULL DeviceName. In this case, we should look it up, instead of BSODing. Right now, this case is fixed by substituting the value to a hardcoded one "\\.\DISPLAY1" in case of NULL and call is made to store the values in registry.

Author: fireball
Date: Tue Dec 12 15:18:17 2006
New Revision: 25129

URL: http://svn.reactos.org/svn/reactos?rev=25129&view=rev
Log:
ChangeDisplaySettingsEx() can be called with NULL DeviceName. In this case, we should look
it up, instead of BSODing.

Right now, this case is fixed by substituting the value to a hardcoded one
"\\.\DISPLAY1" in case of NULL and call is made to store the values in
registry.

Modified:
    trunk/reactos/subsystems/win32/win32k/objects/dc.c

Modified: trunk/reactos/subsystems/win32/win32k/objects/dc.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/win32/win32k/ob…
==============================================================================
--- trunk/reactos/subsystems/win32/win32k/objects/dc.c (original)
+++ trunk/reactos/subsystems/win32/win32k/objects/dc.c Tue Dec 12 15:18:17 2006
@@ -2914,6 +2914,7 @@
 
     UNICODE_STRING DeviceName;
     UNICODE_STRING RegistryKey;
+    UNICODE_STRING InDeviceName;
     OBJECT_ATTRIBUTES ObjectAttributes;
     HANDLE DevInstRegKey;
     ULONG NewValue;
@@ -2921,6 +2922,14 @@
     DPRINT1("set CDS_UPDATEREGISTRY \n");
 
     dwflags &= ~CDS_UPDATEREGISTRY;
+
+    /* Check if pDeviceName is NULL, we need to retrieve it */
+    if (pDeviceName == NULL)
+    {
+      /* FIXME: It is a hack, but there is no proper way right now */
+      RtlInitUnicodeString(&InDeviceName, L"\\\\.\\DISPLAY1");
+      pDeviceName = &InDeviceName;
+    }
 
     Status = GetVideoDeviceName(&DeviceName, pDeviceName);
     if (!NT_SUCCESS(Status))