diff --git a/ThunksList.md b/ThunksList.md
index 657652d..81318d0 100644
--- a/ThunksList.md
+++ b/ThunksList.md
@@ -222,3 +222,6 @@
 | [FlsFree](https://docs.microsoft.com/windows/win32/api/fibersapi/nf-fibersapi-flsfree)                                         | 不存在时，使用Tls实现。警告，此函数请勿跨模块使用！！！
 | [FlsGetValue](https://docs.microsoft.com/windows/win32/api/fibersapi/nf-fibersapi-flsgetvalue)                                 | 不存在时，使用Tls实现。警告，此函数请勿跨模块使用！！！
 | [FlsSetValue](https://docs.microsoft.com/windows/win32/api/fibersapi/nf-fibersapi-flssetvalue)                                 | 不存在时，使用Tls实现。警告，此函数请勿跨模块使用！！！
+| [RoInitialize](https://docs.microsoft.com/windows/win32/api/roapi/nf-roapi-roinitialize)                                       | 不存在时，调用 CoInitializeEx。
+| [RoUninitialize](https://docs.microsoft.com/windows/win32/api/roapi/nf-roapi-rouninitialize)                                   | 不存在时，调用 CoUninitialize。
+
diff --git a/src/Thunks/api-ms-win-core-winrt-string.hpp b/src/Thunks/api-ms-win-core-winrt-string.hpp
index fe35413..4096054 100644
--- a/src/Thunks/api-ms-win-core-winrt-string.hpp
+++ b/src/Thunks/api-ms-win-core-winrt-string.hpp
@@ -25,6 +25,9 @@ namespace YY
                 return pWindowsCreateString(sourceString, length, string);
             }
 
+            if (string)
+                *string = nullptr;
+
             return E_NOTIMPL;
         }
 #endif
@@ -51,6 +54,9 @@ namespace YY
                 return pWindowsCreateStringReference(sourceString, length, hstringHeader, string);
             }
 
+            if (string)
+                *string = nullptr;
+
             return E_NOTIMPL;
         }
 #endif
@@ -98,6 +104,10 @@ namespace YY
                 return pWindowsDuplicateString(string, newString);
             }
 
+
+            if (newString)
+                *newString = nullptr;
+
             return E_NOTIMPL;
         }
 #endif
@@ -145,6 +155,9 @@ namespace YY
                 return pWindowsGetStringRawBuffer(string, length);
             }
 
+            if (length)
+                *length = 0;
+
             return nullptr;
         }
 #endif
diff --git a/src/Thunks/api-ms-win-core-winrt.hpp b/src/Thunks/api-ms-win-core-winrt.hpp
index f521413..3683f66 100644
--- a/src/Thunks/api-ms-win-core-winrt.hpp
+++ b/src/Thunks/api-ms-win-core-winrt.hpp
@@ -24,7 +24,12 @@ namespace YY
 				return pRoInitialize(initType);
 			}
 
-			return E_NOTIMPL;
+			if ((unsigned)initType > (unsigned)RO_INIT_MULTITHREADED)
+			{
+				return E_INVALIDARG;
+			}
+
+			return CoInitializeEx(nullptr, initType ? COINIT_MULTITHREADED : COINIT_APARTMENTTHREADED | COINIT_DISABLE_OLE1DDE);
 		}
 #endif
 
@@ -44,6 +49,8 @@ namespace YY
 			{
 				return pRoUninitialize();
 			}
+
+			CoUninitialize();
 		}
 #endif
 
@@ -66,6 +73,9 @@ namespace YY
 				return pRoActivateInstance(activatableClassId, instance);
 			}
 
+			if (instance)
+				*instance = nullptr;
+
 			return E_NOTIMPL;
 		}
 #endif
@@ -91,6 +101,9 @@ namespace YY
 				return pRoRegisterActivationFactories(activatableClassIds, activationFactoryCallbacks, count, cookie);
 			}
 
+			if (cookie)
+				*cookie = nullptr;
+
 			return E_NOTIMPL;
 		}
 #endif
@@ -136,6 +149,9 @@ namespace YY
 				return pRoGetActivationFactory(activatableClassId, iid, factory);
 			}
 
+			if (factory)
+				*factory = nullptr;
+
 			return E_NOTIMPL;
 
 		}
@@ -162,6 +178,10 @@ namespace YY
 				return pRoRegisterForApartmentShutdown(callbackObject, apartmentIdentifier, regCookie);
 			}
 
+			if (regCookie)
+				*regCookie = nullptr;
+
+
 			return E_NOTIMPL;
 
 		}