我怎样才能在Win 64 32位和64位应用程序之间共享HWND？ [英] How can I share HWND between 32 and 64 bit applications in Win x64?

问题描述

MSDN告诉我，要处理窗口（HWND）可以32位和64位应用程序之间共享，在的进程间通信（MSDN）。然而，在Win32中一个HWND为32位，而在64位的Windows是64位。那么，怎样才能手柄可以共享？

MSDN tells me that handles to windows (HWND) can be shared between 32- and 64-bit applications, in Interprocess Communication (MSDN). However, in Win32 a HWND is 32 bits, whereas in 64 bit Windows it is 64 bits. So how can the handles be shared?

我想同样的问题适用于句柄命名的对象，如互斥，信号和文件句柄。

I guess the same question applies to handles to named objects such as mutexes, semaphores and file handles.

推荐答案

不，他们可以共享的事实意味着，只有低32位在Win64的过程中使用？ Windows处理的指标不是指针，至少就我所知道的，所以除非MS希望允许超过2 ^ 32窗口/文件/互斥/等。处理没有理由在Win64中使用无效*的高32位。

Doesn't the fact that they can be shared imply that only the lower 32 bits are used in Win64 processes? Windows handles are indexes not pointers, at least as far as I can tell, so unless MS wanted to allow more than 2^32 window/file/mutex/etc. handles there's no reason to use the high 32 bits of a void* on Win64.

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