[PATCH 1/2] wbemprox: Return an empty array for __DERIVATION.

[Hans Leidekker]

Based on a patch by Louis Lenders.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=51871
Signed-off-by: Hans Leidekker 
---
 dlls/wbemprox/query.c       | 13 +++++++++++++
 dlls/wbemprox/tests/query.c |  1 +
 2 files changed, 14 insertions(+)

diff --git a/dlls/wbemprox/query.c b/dlls/wbemprox/query.c
index 77ed27e105d..28028474d59 100644
--- a/dlls/wbemprox/query.c
+++ b/dlls/wbemprox/query.c
@@ -1006,6 +1006,19 @@ static HRESULT get_system_propval( const struct view *view, UINT table_index, UI
         if (type) *type = CIM_STRING;
         return S_OK;
     }
+    if (!wcsicmp( name, L"__DERIVATION" ))
+    {
+        if (ret)
+        {
+            SAFEARRAY *sa;
+            FIXME( "returning empty array for __DERIVATION\n" );
+            if (!(sa = SafeArrayCreateVector( VT_BSTR, 0, 0 ))) return E_OUTOFMEMORY;
+            V_VT( ret ) = VT_BSTR | VT_ARRAY;
+            V_ARRAY( ret ) = sa;
+        }
+        if (type) *type = CIM_STRING | CIM_FLAG_ARRAY;
+        return S_OK;
+    }
     FIXME("system property %s not implemented\n", debugstr_w(name));
     return WBEM_E_NOT_FOUND;
 }
diff --git a/dlls/wbemprox/tests/query.c b/dlls/wbemprox/tests/query.c
index 69bb8e7977e..5ca61cff825 100644
--- a/dlls/wbemprox/tests/query.c
+++ b/dlls/wbemprox/tests/query.c
@@ -1642,6 +1642,7 @@ static void test_Win32_VideoController( IWbemServices *services )
         if (hr != S_OK) break;

check_property( obj, L"__CLASS", VT_BSTR, CIM_STRING );
+        check_property( obj, L"__DERIVATION", VT_BSTR | VT_ARRAY, CIM_STRING | CIM_FLAG_ARRAY );
         check_property( obj, L"__GENUS", VT_I4, CIM_SINT32 );
         check_property( obj, L"__NAMESPACE", VT_BSTR, CIM_STRING );
         check_property( obj, L"__PATH", VT_BSTR, CIM_STRING );