[IMM32][NTUSER] Strictly check Cicero IME (#8009)

This PR enhances Cicero IME support.
JIRA issue: CORE-19268
- Add null checks for the functions
  of Cicero IMEs in Imm32LoadIME
  function.
- Add and use
  IS_CICERO_COMPAT_DISABLED
  macro in win32ss/include/ntuser.h.
- Fix ImmGetImeInfoEx,
  Imm32LoadImeDpi,
  ImmGetDescriptionA,
  ImmGetDescriptionW,
  ImmGetIMEFileNameA,
  ImmGetIMEFileNameW, and
  ImmGetProperty functions for
  Cicero IME support.
- Set last error in NtUserGetImeInfoEx.

win32ss/include/ntuser.h

@@ -1206,9 +1206,14 @@ typedef struct tagCURSORDATA
 #define CURSORF_LINKED       0x0100
 #define CURSORF_CURRENT      0x0200
 
+/* Flags for dwCompatFlags2 */
+#define COMPAT_FLAG_2_CICERO_DISABLED 2
+
 #define IS_IMM_MODE() (gpsi && (gpsi->dwSRVIFlags & SRVINFO_IMM32))
 #define IS_CICERO_MODE() (gpsi && (gpsi->dwSRVIFlags & SRVINFO_CICERO_ENABLED))
 #define IS_16BIT_MODE() (GetWin32ClientInfo()->dwTIFlags & TIF_16BIT)
+#define IS_CICERO_COMPAT_DISABLED() \
+    (GetWin32ClientInfo()->dwCompatFlags2 & COMPAT_FLAG_2_CICERO_DISABLED)
 
 typedef struct tagIMEUI
 {

win32ss/user/ntuser/ime.c

@@ -946,7 +946,6 @@ Quit:
     return ret;
 }
 
-// Win: GetImeInfoEx
 BOOL FASTCALL
 UserGetImeInfoEx(
     _Inout_ PWINSTATION_OBJECT pWinSta,
@@ -1006,8 +1005,8 @@ UserGetImeInfoEx(
 BOOL
 NTAPI
 NtUserGetImeInfoEx(
-    PIMEINFOEX pImeInfoEx,
-    IMEINFOEXCLASS SearchType)
+    _Inout_ PIMEINFOEX pImeInfoEx,
+    _In_ IMEINFOEXCLASS SearchType)
 {
     IMEINFOEX ImeInfoEx;
     BOOL ret = FALSE;
@@ -1018,6 +1017,7 @@ NtUserGetImeInfoEx(
     if (!IS_IMM_MODE())
     {
         ERR("!IS_IMM_MODE()\n");
+        EngSetLastError(ERROR_CALL_NOT_IMPLEMENTED);
         goto Quit;
     }
 
@@ -1824,6 +1824,12 @@ NtUserQueryInputContext(HIMC hIMC, DWORD dwType)
             if (ptiIMC->spDefaultImc)
                 ret = (DWORD_PTR)UserHMGetHandle(ptiIMC->spDefaultImc);
             break;
+
+        default:
+        {
+            FIXME("dwType: %ld\n", dwType);
+            break;
+        }
     }
 
 Quit: