doevents

What does “DoEvents” do in vb6?

由 房东的猫 提交于 2019-11-29 09:08:31
What does "DoEvents" do in vb6 ? Why do I get the error message "Out of stack space" ? What does it mean ? DoEvents() allows other Windows messages to be processed. The reason you get an out of stack space error is probably because DoEvents() is allowing events to occur that call your code again, which again calls DoEvents(), and so on until the stack space, which tracks the return addresses for all these calls, has run out. In general, I do not recommend using DoEvents() due to problems like these and the fact that it violates the overall event-driven design of Windows. A slightly different

Avoid Application.DoEvents() in C#

由 让人想犯罪 __ 提交于 2019-11-28 12:07:10
问题 A lot of good programmers (including a lot of good members of Stackoverflow) are against using Application.DoEvents() whatever the circumstances are. Actually it is even supported with plenty of articles in the net, like this one, this famous debate on SO, ... Though, I'm stuck in a case, where (I) think DoEvents() is the unique exit (lack of experience). That's enough as introduction, let's see some coding. I have a 'serialPort' component to connect with a controller through serial

What does “DoEvents” do in vb6?

由 扶醉桌前 提交于 2019-11-28 02:31:37
问题 What does "DoEvents" do in vb6 ? Why do I get the error message "Out of stack space" ? What does it mean ? 回答1: DoEvents() allows other Windows messages to be processed. The reason you get an out of stack space error is probably because DoEvents() is allowing events to occur that call your code again, which again calls DoEvents(), and so on until the stack space, which tracks the return addresses for all these calls, has run out. In general, I do not recommend using DoEvents() due to problems

Get ReadyState from WebBrowser control without DoEvents

由 拜拜、爱过 提交于 2019-11-27 05:22:26
This has been awnsered many times here and at other sites and its working, but I would like ideas to other ways to: get the ReadyState = Complete after using a navigate or post, without using DoEvents because of all of its cons. I would also note that using the DocumentComplete event woud not help here as I wont be navigating on only one page, but one after another like this. wb.navigate("www.microsoft.com") //dont use DoEvents loop here wb.Document.Body.SetAttribute(textbox1, "login") //dont use DoEvents loop here if (wb.documenttext.contais("text")) //do something The way it is today its

Application.DoEvents, when it's necessary and when it's not?

由 百般思念 提交于 2019-11-26 20:57:32
问题 What is the necessity of using Application.DoEvents and when we should use it? 回答1: Application.DoEvents is usually used to make sure that events get handled periodicaly when you're performing some long-running operation on the UI thread. A better solution is just not to do that. Perform long-running operations on separate threads, marshalling to the UI thread (either using Control.BeginInvoke / Invoke or with BackgroundWorker ) when you need to update the UI. Application.DoEvents introduces

How to use DoEvents() without being “evil”?

由 为君一笑 提交于 2019-11-26 00:48:23
问题 A simple search for DoEvents brings up lots of results that lead, basically, to: DoEvents is evil. Don\'t use it. Use threading instead. The reasons generally cited are: Re-entrancy issues Poor performance Usability issues (e.g. drag/drop over a disabled window) But some notable Win32 functions such as TrackPopupMenu and DoDragDrop perform their own message processing to keep the UI responsive, just like DoEvents does. And yet, none of these seem to come across these issues (performance, re

Use of Application.DoEvents()

由 百般思念 提交于 2019-11-25 23:55:56
问题 Can Application.DoEvents() be used in C#? Is this function a way to allow the GUI to catch up with the rest of the app, in much the same way that VB6\'s DoEvents does? 回答1: Hmya, the enduring mystique of DoEvents(). There's been an enormous amount of backlash against it, but nobody ever really explains why it is "bad". The same kind of wisdom as "don't mutate a struct". Erm, why does the runtime and the language supports mutating a struct if that's so bad? Same reason: you shoot yourself in
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