diff --git a/src/event/Event.cpp b/src/event/Event.cpp
index 54947d9..f3363fd 100644
--- a/src/event/Event.cpp
+++ b/src/event/Event.cpp
@@ -167,5 +167,25 @@ void EventRegisterEx(EVENTID id, EVENTHANDLERFUNC handler, void* param, float pr
 }
 
 void EventUnregisterEx(EVENTID id, EVENTHANDLERFUNC handler, void* param, uint32_t flags) {
-    // TODO
+    HEVENTCONTEXT hContext = PropGet(PROP_EVENTCONTEXT);
+
+    uint32_t contextId = *reinterpret_cast<uint32_t*>(hContext);
+    int32_t findMask;
+
+    EvtContext* context = TSingletonInstanceId<EvtContext, offsetof(EvtContext, m_id)>::s_idTable.Ptr(
+        contextId,
+        0,
+        &findMask
+    );
+
+    if (context) {
+        IEvtQueueUnregister(context, id, handler, param, flags);
+
+        if (findMask != -1) {
+            TSingletonInstanceId<EvtContext, offsetof(EvtContext, m_id)>::s_idTable.Unlock(
+                findMask & (INSTANCE_TABLE_SLOT_COUNT - 1),
+                findMask >= INSTANCE_TABLE_SLOT_COUNT
+            );
+        }
+    }
 }
diff --git a/src/event/Queue.cpp b/src/event/Queue.cpp
index 7e61f10..327beb5 100644
--- a/src/event/Queue.cpp
+++ b/src/event/Queue.cpp
@@ -159,3 +159,29 @@ int32_t IEvtQueueCheckSyncKeyState(EvtContext* context, KEY key) {
 
     return keystate;
 }
+
+void IEvtQueueUnregister(EvtContext* context, EVENTID id, EVENTHANDLERFUNC handler, void* param, uint32_t flags) {
+    STORM_VALIDATE_BEGIN;
+    STORM_VALIDATE(context);
+    STORM_VALIDATE_END_VOID;
+
+    auto idMatch = flags & 0x1;
+    auto handlerMatch = flags & 0x2;
+    auto paramMatch = flags & 0x4;
+
+    for (uint32_t q = 0; q < EVENTIDS; q++) {
+        auto listMatched = (!idMatch || q == id);
+
+        if (listMatched) {
+            auto handlerList = &context->m_queueHandlerList[q];
+
+            for (auto node = handlerList->Head(); node; node = handlerList->Next(node)) {
+                auto nodeMatched = (!handlerMatch || node->func == handler) && (!paramMatch || node->param == param);
+
+                if (nodeMatched && !node->marker) {
+                    node = handlerList->DeleteNode(node);
+                }
+            }
+        }
+    }
+}
diff --git a/src/event/Queue.hpp b/src/event/Queue.hpp
index 642e9f7..e1cbb71 100644
--- a/src/event/Queue.hpp
+++ b/src/event/Queue.hpp
@@ -13,4 +13,6 @@ void IEvtQueueRegister(EvtContext* context, EVENTID id, int32_t (*handler)(const
 
 int32_t IEvtQueueCheckSyncKeyState(EvtContext* context, KEY key);
 
+void IEvtQueueUnregister(EvtContext* context, EVENTID id, EVENTHANDLERFUNC handler, void* param, uint32_t flags);
+
 #endif