Ben Timby wrote: > I don't think I am going to end up using a WndProc as that brings a > lot of overhead, namely the need to call PumpWaitingMessages() or > similar. The solution I am looking at right now is to simply create a > hidden window and then call PeekMessage() passing it's hwnd. This > polling method is simpler and works better with the structure of the > daemon. I can simply check for messages inside each iteration of my > main loop and exit when WM_CLOSE is received. > > However, this discussion does raise a couple questions. > > 1. Do I in fact need a window to receive a WM_CLOSE message? If not, > how do I post a message to a process, rather than a window?
Messages in Windows are actually targeted to threads. When you send a message to a window, it gets sent to the message queue for the thread that created the window. It is possible for a thread to have a message queue even without a window, but the queue is not created until the thread checks for messages, so you would still need a message pump. However, there are LOTS of ways to communicate between processes besides window messages. In your case, for example, you could easily create a named event, and signal an event when you want the thread to die. That can be done without creating any windows at all. > 2. Why is there two flavors of SetWindowLong() (win32gui and win32api)? History. Win32api attempts to map a wide variety of API calls as simply as possible -- no typing, little parameter validation. Win32gui is a more sophisticated wrapper around the UI-specific parts of the API, which attempts to provide a mapping between the API parameters and Python types. > 3. If I DO need a window to receive messages, what is the best way to > find said window? Currently I am using FindWindow, but I am not very > happy searching for the window by it's title, I'm voting for a named event. -- Tim Roberts, t...@probo.com Providenza & Boekelheide, Inc. _______________________________________________ python-win32 mailing list python-win32@python.org http://mail.python.org/mailman/listinfo/python-win32
