add

comtypes/automation.py

@@ -347,10 +347,7 @@ def _set_value(self, value):
             memmove(byref(self._), byref(obj), sizeof(obj))
             self.vt = VT_ARRAY | obj._vartype_
         elif isinstance(value, Structure) and hasattr(value, "_recordinfo_"):
-            guids = value._recordinfo_
-            from comtypes.typeinfo import GetRecordInfoFromGuids
-
-            ri = GetRecordInfoFromGuids(*guids)
+            ri = _get_recordinfo(value)  # type: ignore
             self.vt = VT_RECORD
             # Assigning a COM pointer to a structure field does NOT
             # call AddRef(), have to call it manually:
@@ -394,10 +391,7 @@ def _set_value(self, value):
             self._.c_void_p = addressof(ref)
             self.__keepref = value
             if isinstance(ref, Structure) and hasattr(ref, "_recordinfo_"):
-                guids = ref._recordinfo_
-                from comtypes.typeinfo import GetRecordInfoFromGuids
-
-                ri = GetRecordInfoFromGuids(*guids)
+                ri = _get_recordinfo(ref)  # type: ignore
                 self.vt = VT_RECORD | VT_BYREF
                 # Assigning a COM pointer to a structure field does NOT
                 # call AddRef(), have to call it manually:
@@ -411,10 +405,7 @@ def _set_value(self, value):
             self._.c_void_p = addressof(ref)
             self.__keepref = value
             if isinstance(ref, Structure) and hasattr(ref, "_recordinfo_"):
-                guids = ref._recordinfo_
-                from comtypes.typeinfo import GetRecordInfoFromGuids
-
-                ri = GetRecordInfoFromGuids(*guids)
+                ri = _get_recordinfo(ref)  # type: ignore
                 self.vt = VT_RECORD | VT_BYREF
                 # Assigning a COM pointer to a structure field does NOT
                 # call AddRef(), have to call it manually:
@@ -603,6 +594,14 @@ def ChangeType(self, typecode):
 del v
 
 _carg_obj = type(byref(c_int()))
+
+
+def _get_recordinfo(struct: "hints.HasSinderRecordInfo") -> "hints.IRecordInfo":
+    from comtypes.typeinfo import GetRecordInfoFromGuids
+
+    return GetRecordInfoFromGuids(*struct._recordinfo_)
+
+
 from ctypes import Array as _CArrayType
 
 

comtypes/hints.pyi

@@ -39,7 +39,7 @@ else:
 import comtypes
 from comtypes.automation import IDispatch as IDispatch, VARIANT as VARIANT
 from comtypes.server import IClassFactory as IClassFactory
-from comtypes.typeinfo import ITypeInfo as ITypeInfo
+from comtypes.typeinfo import ITypeInfo as ITypeInfo, IRecordInfo as IRecordInfo
 
 Incomplete: TypeAlias = Any
 """The type symbol is used temporarily until the COM library parsers or
@@ -61,6 +61,17 @@ class FirstComItfOf(Generic[_T_coclass]):
     as an argument.
     """
 
+class HasSinderRecordInfo(Protocol):
+    _recordinfo_: Tuple[str, int, int, int, str]
+    """
+    A fixed-length array composed of five elements:
+      - Type library GUID string
+      - Major version number of the type library
+      - Minor version number of the type library
+      - Language code ID number
+      - Type information GUID string
+    """
+
 class _MethodTypeDesc(Protocol):
     arguments: List[Tuple[Any, str, List[str], Optional[Any]]]
     idlflags: List[str]

comtypes/typeinfo.py

@@ -500,6 +500,11 @@ def GetFieldNames(self, *args: Any) -> List[Optional[str]]:
         # XXX Should SysFreeString the array contents. How to?
         return result
 
+    if TYPE_CHECKING:
+
+        def RecordCreateCopy(self, pvSource: Any) -> Optional[int]:
+            ...
+
 
 IRecordInfo._methods_ = [
     COMMETHOD([], HRESULT, "RecordInit", (["in"], c_void_p, "pvNew")),