在WaitForSingleObject中，timeout = INFINITE是否等于timeout = -1?

问题描述

我正在使用别人编写的一些Visual Basic for Applications(VB 6.3)代码，他们已经编写了:

I'm working with some Visual Basic for Applications (VB 6.3) code written by someone else, and they've written:

WaitForSingleObject SEI.hProcess, -1

此过程出现的过程应该在文本框中返回一些数据；有时它无法返回任何东西，我认为是因为这个原因，可能是因为它超时了.该代码是否与以下代码相同:

The process this appears in is supposed to return some data in a text box; sometimes it fails to return anything, and I think it's because of this, possibly because it's its timing out. Is that code the same as:

WaitForSingleObject SEI.hProcess, INFINITE

???

感谢您的帮助.

推荐答案

WaitForSingleObject 实际上是一个DWORD，它是一个 unsigned 32位整数. INFINITE定义为0xFFFFFFFF，但是映射为无符号类型的-1会在大多数整数表示形式中包装并变为该值.

The timeout for WaitForSingleObject is actually a DWORD, which is an unsigned 32 bit integer. INFINITE is defined as 0xFFFFFFFF, but -1 mapped into an unsigned type wraps and becomes this value in most integer representations.

有效，是的.

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