oledb32: Support converting DBTYPE_VARIANT to DBTYPE_UI8.

dlls/oledb32/convert.c

@@ -826,6 +826,11 @@ static HRESULT WINAPI convert_DataConvert(IDataConvert* iface,
         case DBTYPE_UI4:         hr = VarUI8FromUI4(*(DWORD*)src, d);            break;
         case DBTYPE_I8:          hr = VarUI8FromI8(*(LONGLONG*)src, d);          break;
         case DBTYPE_UI8:         *d = *(ULONGLONG*)src; hr = S_OK;               break;
+        case DBTYPE_VARIANT:
+            VariantInit(&tmp);
+            if ((hr = VariantChangeType(&tmp, src, 0, VT_UI8)) == S_OK)
+                *d = V_UI8(&tmp);
+            break;
         default: FIXME("Unimplemented conversion %04x -> UI8\n", src_type); return E_NOTIMPL;
         }
         break;

dlls/oledb32/tests/convert.c

@@ -3082,13 +3082,9 @@ static void test_converttoui8(void)
     V_UI8(&v) = 4321;
     dst_len = 0x1234;
     hr = IDataConvert_DataConvert(convert, DBTYPE_VARIANT, DBTYPE_UI8, 0, &dst_len, &v, &dst, sizeof(dst), 0, &dst_status, 0, 0, 0);
-    todo_wine
     ok(hr == S_OK, "got %08lx\n", hr);
-    todo_wine
     ok(dst_status == DBSTATUS_S_OK, "got %08lx\n", dst_status);
-    todo_wine
     ok(dst_len == sizeof(dst), "got %Id\n", dst_len);
-    todo_wine
     ok(dst.QuadPart == 4321, "got %d\n", (int)dst.QuadPart);
 }