使用keydown中断无限循环？ [英] interrupt infinite loops with keydown?
问题描述
你好，我是visual basic 2005的新手，我正在制作一些带有do循环功能的程序。
i我试图让我的prog退出无限循环时一键在键盘上按下，但我不知道如何编码。谁能帮我？我非常感激。
试试这个链接： http://www.softlookup.com/tutorial/vb/ch08.asp#Heading3
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你好，我是visual basic 2005的新手，我正在制作一些带有do循环功能的程序。
i我试图让我的当按下键盘上的键时，prog退出无限循环，但我不知道如何编码。谁能帮我？我非常感激。
一个简单的方法是创建一个全局变量。我做了几次，创建了一个名为UserWantsOut的全局布尔值。当然，您可能更喜欢其他名称。
在您的循环中，只要说该变量为True即可退出，或者通过 while / until 子句，或循环中的 If 测试。
在KeyDown或KeyPress事件中，如果满足条件（特定键或其他），则只需设置 UserWantsOut = True 。
请注意，如果您的版本中的内容仍然类似于VB6，您可能需要在循环中使用DoEvents以允许Windows去看看键盘。
一个简单的方法是创建一个全局变量。我做了几次，创建了一个名为UserWantsOut的全局布尔值。您可能更喜欢另一个名称，当然一个简单的方法是创建一个全局变量。我做了几次，创建了一个名为UserWantsOut的全局布尔值。当然，您可能更喜欢其他名称。
在循环中，只要说变量为True即可退出，或者通过while / until子句或If测试在循环中。
在KeyDown或KeyPress事件中，如果满足条件（特定键或其他），则只需设置UserWantsOut = True。
请注意，如果您的版本中的内容仍然类似于VB6，您可能需要在循环中使用DoEvents以允许Windows查看键盘。
这很好，但我想我忘了问如何在所述循环中正确执行keydown / keypress事件。我将如何设置doevents语句？
hello, i am new to visual basic 2005 and i am making a few programs with the do loop function.
i am trying to make my prog exit an infinite loop when a key on the keyboard is pressed, but i have no idea how to code this. can anyone help me? i''d be very appreciative.
Try this link: http://www.softlookup.com/tutorial/vb/ch08.asp#Heading3
hello, i am new to visual basic 2005 and i am making a few programs with the do loop function.
i am trying to make my prog exit an infinite loop when a key on the keyboard is pressed, but i have no idea how to code this. can anyone help me? i''d be very appreciative.One simple method is to create a global variable. I have done this a few times, creating a global boolean called UserWantsOut. You may prefer another name, of course.
In your loop, just say to drop out as soon as that variable is True, either by a while/until clause, or an If test inside the loop.
In the KeyDown or KeyPress event, if your conditions are met (specific key, or whatever) then simply set UserWantsOut = True.
Note that if things in your version still resemble VB6, you may nee to have a DoEvents inside your loop to allow Windows to go and look at the keyboard.
One simple method is to create a global variable. I have done this a few times, creating a global boolean called UserWantsOut. You may prefer another name, of courseOne simple method is to create a global variable. I have done this a few times, creating a global boolean called UserWantsOut. You may prefer another name, of course.
In your loop, just say to drop out as soon as that variable is True, either by a while/until clause, or an If test inside the loop.
In the KeyDown or KeyPress event, if your conditions are met (specific key, or whatever) then simply set UserWantsOut = True.
Note that if things in your version still resemble VB6, you may nee to have a DoEvents inside your loop to allow Windows to go and look at the keyboard.
this is good, but i guess i forgot to ask how to properly execute a keydown/keypress event within said loop. how would i set up the doevents statement?
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