user32: Stub implementation of BlockInput.

dlls/user/input.c

@@ -669,6 +669,16 @@ HKL WINAPI ActivateKeyboardLayout(HKL hLayout, UINT flags)
     return USER_Driver->pActivateKeyboardLayout(hLayout, flags);
 }
 
+/**********************************************************************
+ *		BlockInput (USER32.@)
+ */
+BOOL WINAPI BlockInput(BOOL fBlockIt)
+{
+    FIXME_(keyboard)("(%d): stub\n", fBlockIt);
+    SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
+
+    return FALSE;
+}
 
 /***********************************************************************
  *		GetKeyboardLayoutList (USER32.@)

dlls/user/user32.spec

@@ -12,7 +12,7 @@
 @ stdcall AttachThreadInput(long long long)
 @ stdcall BeginDeferWindowPos(long)
 @ stdcall BeginPaint(long ptr)
-# @ stub BlockInput
+@ stdcall BlockInput(long)
 @ stdcall BringWindowToTop(long)
 @ stdcall BroadcastSystemMessage(long ptr long long long) BroadcastSystemMessageA
 @ stdcall BroadcastSystemMessageA(long ptr long long long)