win32com调用ATL编写的COM组件

IDL文件

import "oaidl.idl";
import "ocidl.idl";

[
	object,
	uuid(B325C169-61FA-4513-9DB1-0CC231CCB633),
	dual,
	nonextensible,
	helpstring("IComTestClass Interface"),
	pointer_default(unique)
]
interface IComTestClass : IDispatch{
	[id(1), helpstring("method Method1")] HRESULT Method1(LONG arg1);
};
[
	uuid(9098C7D5-91BA-4C0C-837B-DB81C3DBA6AE),
	version(1.0),
	helpstring("ComTest 1.0 Type Library")
]
library ComTestLib
{
	importlib("stdole2.tlb");
	[
		uuid(F41DAE07-8D10-430B-8834-06BB4B9AE8A2),
		helpstring("_IComTestClassEvents Interface")
	]
	dispinterface _IComTestClassEvents
	{
		properties:
		methods:
			[id(1), helpstring("method Event1")] HRESULT Event1(LONG arg1);
	};
	[
		uuid(2961361E-8E6D-4618-95A8-4DF03B65BDC3),
		helpstring("ComTestClass Class")
	]
	coclass ComTestClass
	{
		[default] interface IComTestClass;
		[default, source] dispinterface _IComTestClassEvents;
	};
};

Method1中触发事件

STDMETHODIMP CComTestClass::Method1(LONG arg1)
{
	// TODO: Add your implementation code here
	Fire_Event1(arg1);
	return S_OK;
}

win32com调用组件

import win32com.client

class EventHandler:
	def OnEvent1(self, val):
		print(val)
	
o = win32com.client.DispatchWithEvents("ComTest.ComTestClass", EventHandler)
o.Method1(23)