diff --git a/dll/win32/imm32/compstr.c b/dll/win32/imm32/compstr.c
index 7fa9a0e4111..b49b4a5db19 100644
--- a/dll/win32/imm32/compstr.c
+++ b/dll/win32/imm32/compstr.c
@@ -527,7 +527,7 @@ Imm32SetCompositionStringAW(HIMC hIMC, DWORD dwIndex, LPVOID pComp, DWORD dwComp
     UINT uCodePage;
     LPRECONVERTSTRING pRS;
 
-    dwThreadId = NtUserQueryInputContext(hIMC, 1);
+    dwThreadId = (DWORD)NtUserQueryInputContext(hIMC, QIC_INPUTTHREADID);
     if (dwThreadId != GetCurrentThreadId())
         return FALSE;
 
diff --git a/dll/win32/imm32/ime.c b/dll/win32/imm32/ime.c
index cfe0b66754e..7da1ea09fec 100644
--- a/dll/win32/imm32/ime.c
+++ b/dll/win32/imm32/ime.c
@@ -376,7 +376,7 @@ Imm32GetImeMenuItemsAW(HIMC hIMC, DWORD dwFlags, DWORD dwType, LPVOID lpImeParen
     if (!hIMC)
         return 0;
 
-    dwProcessId = NtUserQueryInputContext(hIMC, 0);
+    dwProcessId = (DWORD)NtUserQueryInputContext(hIMC, QIC_INPUTPROCESSID);
     if (dwProcessId == 0)
         return 0;
 
@@ -392,7 +392,7 @@ Imm32GetImeMenuItemsAW(HIMC hIMC, DWORD dwFlags, DWORD dwType, LPVOID lpImeParen
     if (pIC == NULL)
         return 0;
 
-    dwThreadId = NtUserQueryInputContext(hIMC, 1);
+    dwThreadId = (DWORD)NtUserQueryInputContext(hIMC, QIC_INPUTTHREADID);
     if (dwThreadId == 0)
     {
         ImmUnlockIMC(hIMC);
diff --git a/dll/win32/imm32/imm.c b/dll/win32/imm32/imm.c
index c21c5a23567..4ac2cdebb6e 100644
--- a/dll/win32/imm32/imm.c
+++ b/dll/win32/imm32/imm.c
@@ -818,7 +818,7 @@ LPINPUTCONTEXT APIENTRY Imm32LockIMCEx(HIMC hIMC, BOOL fSelect)
 
     if (!pClientImc->hInputContext)
     {
-        dwThreadId = (DWORD)NtUserQueryInputContext(hIMC, 1);
+        dwThreadId = (DWORD)NtUserQueryInputContext(hIMC, QIC_INPUTTHREADID);
 
         if (dwThreadId == GetCurrentThreadId() && Imm32IsCiceroMode() && !Imm32Is16BitMode())
         {
@@ -833,7 +833,7 @@ LPINPUTCONTEXT APIENTRY Imm32LockIMCEx(HIMC hIMC, BOOL fSelect)
             }
         }
 
-        if (!NtUserQueryInputContext(hIMC, 2))
+        if (!NtUserQueryInputContext(hIMC, QIC_DEFAULTWINDOWIME))
         {
             RtlLeaveCriticalSection(&pClientImc->cs);
             goto Quit;
diff --git a/dll/win32/imm32/precomp.h b/dll/win32/imm32/precomp.h
index 285ab70b8d1..4cd92e5e09d 100644
--- a/dll/win32/imm32/precomp.h
+++ b/dll/win32/imm32/precomp.h
@@ -97,7 +97,7 @@ BOOL APIENTRY Imm32ReleaseIME(HKL hKL);
 
 static inline BOOL Imm32IsCrossThreadAccess(HIMC hIMC)
 {
-    DWORD dwImeThreadId = NtUserQueryInputContext(hIMC, 1);
+    DWORD dwImeThreadId = (DWORD)NtUserQueryInputContext(hIMC, QIC_INPUTTHREADID);
     DWORD dwThreadId = GetCurrentThreadId();
     return (dwImeThreadId != dwThreadId);
 }
diff --git a/dll/win32/imm32/utils.c b/dll/win32/imm32/utils.c
index e035fec3ed2..29c2c3adfeb 100644
--- a/dll/win32/imm32/utils.c
+++ b/dll/win32/imm32/utils.c
@@ -186,7 +186,7 @@ BOOL APIENTRY Imm32CheckImcProcess(PIMC pIMC)
         return TRUE;
 
     hIMC = pIMC->head.h;
-    dwProcessID = NtUserQueryInputContext(hIMC, 0);
+    dwProcessID = (DWORD)NtUserQueryInputContext(hIMC, QIC_INPUTPROCESSID);
     return dwProcessID == (DWORD_PTR)NtCurrentTeb()->ClientId.UniqueProcess;
 }
 
@@ -211,7 +211,7 @@ Imm32NotifyAction(HIMC hIMC, HWND hwnd, DWORD dwAction, DWORD_PTR dwIndex, DWORD
 
     if (dwAction)
     {
-        dwThreadId = NtUserQueryInputContext(hIMC, 1);
+        dwThreadId = (DWORD)NtUserQueryInputContext(hIMC, QIC_INPUTTHREADID);
         if (dwThreadId)
         {
             /* find keyboard layout and lock it */
diff --git a/sdk/include/reactos/undocuser.h b/sdk/include/reactos/undocuser.h
index f63e5cd4153..ca13a8b0239 100644
--- a/sdk/include/reactos/undocuser.h
+++ b/sdk/include/reactos/undocuser.h
@@ -379,6 +379,15 @@ BOOL WINAPI RegisterUserApiHook(PUSERAPIHOOKINFO puah);
 
 BOOL WINAPI UnregisterUserApiHook(VOID);
 
+/* dwType for NtUserQueryInputContext */
+typedef enum _QUERY_INPUT_CONTEXT
+{
+    QIC_INPUTPROCESSID = 0,
+    QIC_INPUTTHREADID,
+    QIC_DEFAULTWINDOWIME,
+    QIC_DEFAULTIMC
+} QUERY_INPUT_CONTEXT;
+
 #ifdef __cplusplus
 } /* extern "C" */
 #endif /* defined(__cplusplus) */
diff --git a/win32ss/include/ntuser.h b/win32ss/include/ntuser.h
index 9d936530827..0e6d4c3b4d9 100644
--- a/win32ss/include/ntuser.h
+++ b/win32ss/include/ntuser.h
@@ -2877,11 +2877,11 @@ NtUserQueryInformationThread(
     OUT PVOID ThreadInformation,
     IN ULONG ThreadInformationLength);
 
-DWORD
+DWORD_PTR
 NTAPI
 NtUserQueryInputContext(
     HIMC hIMC,
-    DWORD dwUnknown2);
+    DWORD dwType);
 
 DWORD
 NTAPI
diff --git a/win32ss/user/ntuser/ntstubs.c b/win32ss/user/ntuser/ntstubs.c
index 9d7b624151b..1a173714958 100644
--- a/win32ss/user/ntuser/ntstubs.c
+++ b/win32ss/user/ntuser/ntstubs.c
@@ -647,14 +647,51 @@ Quit:
     return Status;
 }
 
-DWORD
+DWORD_PTR
 APIENTRY
 NtUserQueryInputContext(
     HIMC hIMC,
-    DWORD dwUnknown2)
+    DWORD dwType)
 {
-    TRACE("NtUserQueryInputContext(%p, 0x%lX)\n", hIMC, dwUnknown2);
-    return 0;
+    PIMC pIMC;
+    PTHREADINFO ptiIMC;
+    DWORD_PTR ret = 0;
+
+    UserEnterExclusive();
+
+    if (!IS_IMM_MODE())
+        goto Quit;
+
+    pIMC = UserGetObject(gHandleTable, hIMC, TYPE_INPUTCONTEXT);
+    if (!pIMC)
+        goto Quit;
+
+    ptiIMC = pIMC->head.pti;
+
+    switch (dwType)
+    {
+        case QIC_INPUTPROCESSID:
+            ret = (DWORD_PTR)PsGetThreadProcessId(ptiIMC->pEThread);
+            break;
+
+        case QIC_INPUTTHREADID:
+            ret = (DWORD_PTR)PsGetThreadId(ptiIMC->pEThread);
+            break;
+
+        case QIC_DEFAULTWINDOWIME:
+            if (ptiIMC->spwndDefaultIme)
+                ret = (DWORD_PTR)UserHMGetHandle(ptiIMC->spwndDefaultIme);
+            break;
+
+        case QIC_DEFAULTIMC:
+            if (ptiIMC->spDefaultImc)
+                ret = (DWORD_PTR)UserHMGetHandle(ptiIMC->spDefaultImc);
+            break;
+    }
+
+Quit:
+    UserLeave();
+    return ret;
 }
 
 BOOL