diff --git a/comtypes/_post_coinit/misc.py b/comtypes/_post_coinit/misc.py
index e2c92108..7910389b 100644
--- a/comtypes/_post_coinit/misc.py
+++ b/comtypes/_post_coinit/misc.py
@@ -14,6 +14,7 @@
 )
 from ctypes.wintypes import DWORD, LPCWSTR, LPVOID
 from typing import TYPE_CHECKING, Any, Optional, TypeVar, overload
+from typing import Union as _UnionT
 
 from comtypes import CLSCTX_LOCAL_SERVER, CLSCTX_REMOTE_SERVER, CLSCTX_SERVER, GUID
 from comtypes._memberspec import COMMETHOD
@@ -21,7 +22,7 @@
 from comtypes.GUID import REFCLSID
 
 if TYPE_CHECKING:
-    from ctypes import _Pointer
+    from ctypes import _CArgObject, _Pointer
 
     from comtypes import hints as hints  # noqa  # type: ignore
 
@@ -146,20 +147,20 @@ def CoCreateInstance(
 def CoGetClassObject(
     clsid: GUID,
     clsctx: Optional[int] = None,
-    pServerInfo: "Optional[COSERVERINFO]" = None,
+    pServerInfo: "_UnionT[None, _CArgObject, COSERVERINFO]" = None,
     interface: None = None,
 ) -> "hints.IClassFactory": ...
 @overload
 def CoGetClassObject(
     clsid: GUID,
     clsctx: Optional[int] = None,
-    pServerInfo: "Optional[COSERVERINFO]" = None,
+    pServerInfo: "_UnionT[None, _CArgObject, COSERVERINFO]" = None,
     interface: type[_T_IUnknown] = IUnknown,
 ) -> _T_IUnknown: ...
 def CoGetClassObject(
     clsid: GUID,
     clsctx: Optional[int] = None,
-    pServerInfo: "Optional[COSERVERINFO]" = None,
+    pServerInfo: "_UnionT[None, _CArgObject, COSERVERINFO]" = None,
     interface: Optional[type[IUnknown]] = None,
 ) -> IUnknown:
     if clsctx is None:
@@ -337,7 +338,7 @@ def CoCreateInstanceEx(
     interface: None = None,
     clsctx: Optional[int] = None,
     machine: Optional[str] = None,
-    pServerInfo: Optional[COSERVERINFO] = None,
+    pServerInfo: "_UnionT[None, _CArgObject, COSERVERINFO]" = None,
 ) -> IUnknown: ...
 @overload
 def CoCreateInstanceEx(
@@ -345,14 +346,14 @@ def CoCreateInstanceEx(
     interface: type[_T_IUnknown],
     clsctx: Optional[int] = None,
     machine: Optional[str] = None,
-    pServerInfo: Optional[COSERVERINFO] = None,
+    pServerInfo: "_UnionT[None, _CArgObject, COSERVERINFO]" = None,
 ) -> _T_IUnknown: ...
 def CoCreateInstanceEx(
     clsid: GUID,
     interface: Optional[type[IUnknown]] = None,
     clsctx: Optional[int] = None,
     machine: Optional[str] = None,
-    pServerInfo: Optional[COSERVERINFO] = None,
+    pServerInfo: "_UnionT[None, _CArgObject, COSERVERINFO]" = None,
 ) -> IUnknown:
     """The basic windows api to create a COM class object and return a
     pointer to an interface, possibly on another machine.
diff --git a/comtypes/client/_activeobj.py b/comtypes/client/_activeobj.py
index d70f7bc9..7130f0e5 100644
--- a/comtypes/client/_activeobj.py
+++ b/comtypes/client/_activeobj.py
@@ -1,4 +1,4 @@
-from typing import Any, Optional, TypeVar, overload
+from typing import Any, Literal, Optional, TypeVar, overload
 from typing import Union as _UnionT
 
 import comtypes
@@ -14,10 +14,24 @@
 # Object creation
 #
 @overload
-def GetActiveObject(progid: _UnionT[str, type[CoClass], GUID]) -> Any: ...
+def GetActiveObject(
+    progid: _UnionT[str, type[CoClass], GUID],
+    interface: None = None,
+    dynamic: Literal[False] = False,
+) -> Any: ...
+@overload
+def GetActiveObject(
+    progid: _UnionT[str, type[CoClass], GUID],
+    interface: None = None,
+    dynamic: Literal[True] = True,
+) -> _UnionT[
+    "comtypes.client.lazybind.Dispatch", "comtypes.client.dynamic._Dispatch"
+]: ...
 @overload
 def GetActiveObject(
-    progid: _UnionT[str, type[CoClass], GUID], interface: type[_T_IUnknown]
+    progid: _UnionT[str, type[CoClass], GUID],
+    interface: type[_T_IUnknown] = IUnknown,
+    dynamic: Literal[False] = False,
 ) -> _T_IUnknown: ...
 def GetActiveObject(
     progid: _UnionT[str, type[CoClass], GUID],
diff --git a/comtypes/client/_create.py b/comtypes/client/_create.py
index 8ac9fc18..39ff2406 100644
--- a/comtypes/client/_create.py
+++ b/comtypes/client/_create.py
@@ -1,5 +1,5 @@
 import logging
-from typing import TYPE_CHECKING, Any, Optional, TypeVar, overload
+from typing import TYPE_CHECKING, Any, Literal, Optional, TypeVar, overload
 from typing import Union as _UnionT
 
 import comtypes
@@ -8,6 +8,8 @@
 from comtypes.client._managing import _manage
 
 if TYPE_CHECKING:
+    from ctypes import _CArgObject
+
     from comtypes import hints  # type: ignore
 
 
@@ -23,20 +25,20 @@
 def GetClassObject(
     progid: _UnionT[str, type[CoClass], GUID],
     clsctx: Optional[int] = None,
-    pServerInfo: Optional[COSERVERINFO] = None,
+    pServerInfo: "_UnionT[None, _CArgObject, COSERVERINFO]" = None,
     interface: None = None,
 ) -> "hints.IClassFactory": ...
 @overload
 def GetClassObject(
     progid: _UnionT[str, type[CoClass], GUID],
     clsctx: Optional[int] = None,
-    pServerInfo: Optional[COSERVERINFO] = None,
+    pServerInfo: "_UnionT[None, _CArgObject, COSERVERINFO]" = None,
     interface: type[_T_IUnknown] = IUnknown,
 ) -> _T_IUnknown: ...
 def GetClassObject(
     progid: _UnionT[str, type[CoClass], GUID],
     clsctx: Optional[int] = None,
-    pServerInfo: Optional[COSERVERINFO] = None,
+    pServerInfo: "_UnionT[None, _CArgObject, COSERVERINFO]" = None,
     interface: Optional[type[IUnknown]] = None,
 ) -> IUnknown:
     """Create and return the class factory for a COM object.
@@ -56,9 +58,29 @@ def CreateObject(
     progid: _UnionT[str, type[CoClass], GUID],
     clsctx: Optional[int] = None,
     machine: Optional[str] = None,
-    interface: Optional[type[_T_IUnknown]] = None,
-    dynamic: bool = ...,
-    pServerInfo: Optional[COSERVERINFO] = None,
+    interface: None = None,
+    dynamic: Literal[False] = False,
+    pServerInfo: "_UnionT[None, _CArgObject, COSERVERINFO]" = None,
+) -> Any: ...
+@overload
+def CreateObject(
+    progid: _UnionT[str, type[CoClass], GUID],
+    clsctx: Optional[int] = None,
+    machine: Optional[str] = None,
+    interface: None = None,
+    dynamic: Literal[True] = True,
+    pServerInfo: "_UnionT[None, _CArgObject, COSERVERINFO]" = None,
+) -> _UnionT[
+    "comtypes.client.lazybind.Dispatch", "comtypes.client.dynamic._Dispatch"
+]: ...
+@overload
+def CreateObject(
+    progid: _UnionT[str, type[CoClass], GUID],
+    clsctx: Optional[int] = None,
+    machine: Optional[str] = None,
+    interface: type[_T_IUnknown] = IUnknown,
+    dynamic: Literal[False] = False,
+    pServerInfo: "_UnionT[None, _CArgObject, COSERVERINFO]" = None,
 ) -> _T_IUnknown: ...
 def CreateObject(
     progid: _UnionT[str, type[CoClass], GUID],  # which object to create
@@ -66,7 +88,7 @@ def CreateObject(
     machine: Optional[str] = None,  # where to create the object
     interface: Optional[type[IUnknown]] = None,  # the interface we want
     dynamic: bool = False,  # use dynamic dispatch
-    pServerInfo: Optional[COSERVERINFO] = None,  # server info struct for remoting
+    pServerInfo: "_UnionT[None, _CArgObject, COSERVERINFO]" = None,  # server info struct for remoting
 ) -> Any:
     """Create a COM object from 'progid', and try to QueryInterface()
     it to the most useful interface, generating typelib support on
@@ -122,12 +144,26 @@ def CreateObject(
     return _manage(obj, clsid, interface=interface)
 
 
-@overload
-def CoGetObject(displayname: str, interface: type[_T_IUnknown]) -> _T_IUnknown: ...
 @overload
 def CoGetObject(
-    displayname: str, interface: None = None, dynamic: bool = False
+    displayname: str,
+    interface: None = None,
+    dynamic: Literal[False] = False,
 ) -> Any: ...
+@overload
+def CoGetObject(
+    displayname: str,
+    interface: None = None,
+    dynamic: Literal[True] = True,
+) -> _UnionT[
+    "comtypes.client.lazybind.Dispatch", "comtypes.client.dynamic._Dispatch"
+]: ...
+@overload
+def CoGetObject(
+    displayname: str,
+    interface: type[_T_IUnknown],
+    dynamic: Literal[False] = False,
+) -> _T_IUnknown: ...
 def CoGetObject(
     displayname: str,
     interface: Optional[type[IUnknown]] = None,