Active Oldest Votes. I have found answers to most of my own questions. Threading import Dispatcher from System. CurrentDispatcher def display : print threading. Run some related links: more info about the Dispatcher more about the Action delegate.
Improve this answer. I fixed the problems I had when using python threads in winforms applications with pythonnet thanks to this answer. Many thanks! Sign up or log in Sign up using Google. Sign up using Facebook.
Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Podcast Making Agile work for data science. Stack Gives Back Before processing a message that may have been sent from another thread, a window procedure should first call the InSendMessage function. If this function returns TRUE , the window procedure should call ReplyMessage before any function that causes the thread to yield control, as shown in the following example.
A number of messages can be sent to controls in a dialog box. These control messages set the appearance, behavior, and content of controls or retrieve information about controls. Use the SendDlgItemMessage function to send a message to a control, specifying the identifier of the control and the handle of the dialog box window that contains the control.
The following example, taken from a dialog box procedure, copies a string from a combo box's edit control into its list box. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. Please rate your experience Yes No. Any additional feedback?
In this article. A value of win32event. A code of win32event. In this case, no message is waiting, and none of our kernel objects of interest were signaled. Basically, the way to tune this recipe for yourself is by using the right kernel objects as waitables with an appropriate response to each and by doing whatever you need to do periodically in the polling case.
Skip to main content. Start your free trial. Why don't we just call our WndProc directly? Well our message loop is responsible for ALL of the windows in our program, this includes things like buttons and list boxes that have their own window procedures, so we need to make sure that we call the right procedure for the window.
Since more than one window can use the same window procedure, the first parameter the handle to the window is used to tell the window procedure which window the message is intended for. As you can see, your application spends the majority of it's time spinning round and round in this message loop, where you joyfully send out messages to the happy windows that will process them.
But what do you do when you want your program to exit? This is exactly what PostQuitMessage accomplishes. At this point, the wParam member of Msg contains the value that you passed to PostQuitMessage and you can either ignore it, or return it from WinMain which will then be used as the exit code when the process terminates. Make sure you remember this, or it will catch you out at some point It may be of note that I used to use the first of these throughout the tutorial, since as I just mentioned, it works fine as long as GetMessage never fails, which when your code is correct it won't.
However I failed to take into consideration that if you're reading this, your code probably won't be correct a lot of the time, and GetMessage will fail at some point : I've gone through and corrected this, but forgive me if I've missed a few spots. I hope you now have a better understanding of the windows message loop, if not, do not fear, things will make more sense once you have been using them for a while.
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