[greatlrd] 17206: Fix some error checking for DireactDrawCreate and DireactDrawCreateEx, we checking if the param is right or not.

Fix some error checking for DireactDrawCreate and DireactDrawCreateEx,
we checking if the param is right or not.
Modified: trunk/reactos/lib/ddraw/main.c
  _____  

Modified: trunk/reactos/lib/ddraw/main.c
--- trunk/reactos/lib/ddraw/main.c	2005-08-08 15:39:35 UTC (rev
17205)
+++ trunk/reactos/lib/ddraw/main.c	2005-08-08 15:41:02 UTC (rev
17206)
@@ -15,10 +15,7 @@

 
 HRESULT WINAPI Create_DirectDraw (LPGUID pGUID, LPDIRECTDRAW* pIface,
 
IUnknown* pUnkOuter, BOOL ex)
-{
-    if (pUnkOuter!=NULL) 
-		return DDERR_INVALIDPARAMS; 
-
+{   
     IDirectDrawImpl* This =
(IDirectDrawImpl*)HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
sizeof(IDirectDrawImpl));
 
 	if (This == NULL) 
@@ -32,15 +29,33 @@
 }
 
 HRESULT WINAPI DirectDrawCreate (LPGUID lpGUID, LPDIRECTDRAW* lplpDD,
LPUNKNOWN pUnkOuter) 
-{    	
+{   
+
+	/* check see if pUnkOuter is null or not */
+	if (!pUnkOuter)
+	{
+		/* we do not use same error code as MS, ms use 0x8004110
*/
+		return DDERR_INVALIDPARAMS; 
+	}
+	
 	return Create_DirectDraw (lpGUID, lplpDD, pUnkOuter, FALSE);
 }
  
 HRESULT WINAPI DirectDrawCreateEx(LPGUID lpGUID, LPVOID* lplpDD, REFIID
iid, LPUNKNOWN pUnkOuter)
-{
+{    
+	/* check see if pUnkOuter is null or not */
+	if (!pUnkOuter)
+	{
+		/* we do not use same error code as MS, ms use 0x8004110
*/
+		return DDERR_INVALIDPARAMS; 
+	}
+
+	/* Is it a DirectDraw 7 Request or not */
 	if (!IsEqualGUID(iid, &IID_IDirectDraw7)) 
-		return DDERR_INVALIDPARAMS;
-
+	{
+	  return DDERR_INVALIDPARAMS;
+	}
+    	
     return Create_DirectDraw (lpGUID, (LPDIRECTDRAW*)lplpDD, pUnkOuter,
TRUE);
 }