diff --git a/reactos/include/ndk/rtlfuncs.h b/reactos/include/ndk/rtlfuncs.h
index 3713530250b..487a1b96dd4 100644
--- a/reactos/include/ndk/rtlfuncs.h
+++ b/reactos/include/ndk/rtlfuncs.h
@@ -1932,6 +1932,18 @@ RtlSetProcessIsCritical(
 
 #define NtCurrentPeb() (NtCurrentTeb()->ProcessEnvironmentBlock)
 
+//
+// Thread Pool Functions
+//
+
+NTSYSAPI
+NTSTATUS
+NTAPI
+RtlQueueWorkItem(
+    IN WORKERCALLBACKFUNC Function,
+    IN PVOID Context  OPTIONAL,
+    IN ULONG Flags);
+
 //
 // Environment/Path Functions
 //
diff --git a/reactos/include/psdk/winnt.h b/reactos/include/psdk/winnt.h
index 91f604d2dcb..bdabef7763e 100644
--- a/reactos/include/psdk/winnt.h
+++ b/reactos/include/psdk/winnt.h
@@ -666,6 +666,7 @@ typedef enum
 #define LANG_ESTONIAN	0x25
 #define LANG_LATVIAN	0x26
 #define LANG_LITHUANIAN	0x27
+#define LANG_TAJIK	0x28
 #define LANG_FARSI	0x29
 #define LANG_VIETNAMESE	0x2a
 #define LANG_ARMENIAN	0x2b
@@ -804,6 +805,7 @@ typedef enum
 #define SUBLANG_SPANISH_PUERTO_RICO	0x14
 #define SUBLANG_SWEDISH	0x01
 #define SUBLANG_SWEDISH_FINLAND	0x02
+#define SUBLANG_TAJIK_TAJIKISTAN	0x01
 #define SUBLANG_THAI_THAILAND 0x1
 #define SUBLANG_URDU_PAKISTAN	0x01
 #define SUBLANG_URDU_INDIA	0x02
@@ -1071,6 +1073,8 @@ typedef enum
 #define IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG	10
 #define IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT	11
 #define IMAGE_DIRECTORY_ENTRY_IAT	12
+#define IMAGE_DIRECTORY_ENTRY_DELAY_IMPORT	13
+#define IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR	14
 #define IMAGE_SCN_TYPE_REG 0
 #define IMAGE_SCN_TYPE_DSECT 1
 #define IMAGE_SCN_TYPE_NOLOAD 2
@@ -1482,12 +1486,16 @@ typedef enum
 #define VER_SUITE_BLADE 1024
 #define WT_EXECUTEDEFAULT 0x00000000
 #define WT_EXECUTEINIOTHREAD 0x00000001
+#define WT_EXECUTEINUITHREAD 0x00000002
 #define WT_EXECUTEINWAITTHREAD 0x00000004
 #define WT_EXECUTEONLYONCE 0x00000008
 #define WT_EXECUTELONGFUNCTION 0x00000010
 #define WT_EXECUTEINTIMERTHREAD 0x00000020
+#define WT_EXECUTEINPERSISTENTIOTHREAD 0x00000040
 #define WT_EXECUTEINPERSISTENTTHREAD 0x00000080
 #define WT_TRANSFER_IMPERSONATION 0x00000100
+#define WT_SET_MAX_THREADPOOL_THREADS(flags,limit) ((flags)|=(limit)<<16)
+typedef VOID (NTAPI *WORKERCALLBACKFUNC)(PVOID);
 #if (_WIN32_WINNT >= 0x0501)
 #define ACTIVATION_CONTEXT_SECTION_ASSEMBLY_INFORMATION 1
 #define ACTIVATION_CONTEXT_SECTION_DLL_REDIRECTION 2