In WaitForSingleObject, is timeout=INFINITE the same as timeout=-1?

问题

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

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

???

Thanks for your help.

回答1:

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.

Is that code the same as:

Effectively, yes.

来源：https://stackoverflow.com/questions/19578949/in-waitforsingleobject-is-timeout-infinite-the-same-as-timeout-1