diff --git a/include/textstor.idl b/include/textstor.idl
index c6d88c7d04a..5aa1279bbde 100644
--- a/include/textstor.idl
+++ b/include/textstor.idl
@@ -37,13 +37,25 @@ cpp_quote("#define TS_S_ASYNC           MAKE_HRESULT(SEVERITY_SUCCESS, FACILITY_
 
 const ULONG TS_DEFAULT_SELECTION = ~0u;
 
-const DWORD TS_SD_READONLY     = 0x001;
-const DWORD TS_SD_LOADING      = 0x002;
+const DWORD TS_SD_READONLY              = 0x001;
+const DWORD TS_SD_LOADING               = 0x002;
+const DWORD TS_SD_RESERVED              = 0x004;
+const DWORD TS_SD_TKBAUTOCORRECTENABLE  = 0x008;
+const DWORD TS_SD_TKBPREDICTIONENABLE   = 0x010;
+const DWORD TS_SD_UIINTEGRATIONENABLE   = 0x020;
+const DWORD TS_SD_INPUTPANEMANUALDISPLAYENABLE = 0x040;
+const DWORD TS_SD_EMBEDDEDHANDWRITINGVIEW_ENABLED = 0x080;
+const DWORD TS_SD_EMBEDDEDHANDWRITINGVIEW_VISIBLE = 0x100;
 
-const DWORD TS_SS_DISJOINTSEL  = 0x001;
-const DWORD TS_SS_REGIONS      = 0x002;
-const DWORD TS_SS_TRANSITORY   = 0x004;
-const DWORD TS_SS_NOHIDDENTEXT = 0x008;
+const DWORD TS_SD_MASKALL = (TS_SD_READONLY | TS_SD_LOADING);
+
+const DWORD TS_SS_DISJOINTSEL           = 0x001;
+const DWORD TS_SS_REGIONS               = 0x002;
+const DWORD TS_SS_TRANSITORY            = 0x004;
+const DWORD TS_SS_NOHIDDENTEXT          = 0x008;
+const DWORD TS_SS_TKBAUTOCORRECTENABLE  = 0x010;
+const DWORD TS_SS_TKBPREDICTIONENABLE   = 0x020;
+const DWORD TS_SS_UWPCONTROL            = 0x040;
 
 const DWORD TS_AS_TEXT_CHANGE      = 0x01;
 const DWORD TS_AS_SEL_CHANGE       = 0x02;