StdFunction(HRESULT, "Direct3DCreate9Ex", [(UINT, "SDKVersion"), Out(Pointer(PDIRECT3D9EX), "ppD3D")], fail='D3DERR_NOTAVAILABLE'),
     StdFunction(Int, "D3DPERF_BeginEvent", [(D3DCOLOR, "col"), (LPCWSTR, "wszName")], fail='-1'),
     StdFunction(Int, "D3DPERF_EndEvent", [], fail='-1'),
-    StdFunction(Void, "D3DPERF_SetMarker", [(D3DCOLOR, "col"), (LPCWSTR, "wszName")], fail=''),
-    StdFunction(Void, "D3DPERF_SetRegion", [(D3DCOLOR, "col"), (LPCWSTR, "wszName")], fail=''),
+    StdFunction(Void, "D3DPERF_SetMarker", [(D3DCOLOR, "col"), (LPCWSTR, "wszName")]),
+    StdFunction(Void, "D3DPERF_SetRegion", [(D3DCOLOR, "col"), (LPCWSTR, "wszName")]),
     StdFunction(BOOL, "D3DPERF_QueryRepeatFrame", [], fail='FALSE'),
     StdFunction(Void, "D3DPERF_SetOptions", [(DWORD, "dwOptions")], fail=''),
     StdFunction(DWORD, "D3DPERF_GetStatus", [], fail='0'),