LPHANDLE vs.HANDLE

问题描述

在浏览一些代码时，我发现了对.该代码可以编译并正常工作.但是，我们传递的是 HANDLE ，而不是 LPHANDLE (如MSDN中所指定).我发现在 windef.h 中存在以下声明:

While browsing some code I found a call to OpenPrinter(). The code compiles and works fine. But, we are passing a HANDLE instead of LPHANDLE (as specified in MSDN). I found out that in windef.h the following declaration exists:

typedef HANDLE FAR          *LPHANDLE;

LP代表什么?我应该使用 LPHANDLE 还是保留 HANDLE ?

What does LP stand for? Should I use a LPHANDLE, or keep HANDLE?

推荐答案

LP表示长指针.在这种情况下，它是指向句柄的指针.

LP stands for Long Pointer. It's a pointer to a handle in this case.

HANDLE h = <winapi function>();
LPHANDLE ph = &h;

您可以通过取消引用指针的方式使用与处理手柄相同的方式:

You can use it the same way you would a handle by dereferencing the pointer:

HANDLE anotherh = *ph;
or
<winapi function>(*ph, ...);

这篇关于LPHANDLE vs.HANDLE的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！