为什么我不能关闭的窗口句柄在我的code？ [英] Why can't I close the window handle in my code?

问题描述

我在我的主要这两行，但我不能在年底关闭句柄。
我试图得到一个处理窗口矿山催泪小说，之后关闭它，但它不工作。我有所有相关的，包括我所需要的。

I have these two lines in my main, but I can not close the the handle in the end. I am trying to get a handle to windows mines weeper and close it after that, but it doesn't work. And I have all the relevant includes I need.

#include <windows.h>
#include <stdio.h>

在主

HWND wh = FindWindow("Minesweeper", "Minesweeper");
CloseHandle (wh);

在的printf WH 我看到价值是相同的这个间谍提出++。

On the printf of wh I see the value is identical to this raised in spy++.

和我得到的错误

异常地址：0x7c90e4ff

"Exception address: 0x7c90e4ff"

我是什么失踪？

BTW：
如果我改变上述两行的过程中关闭手柄正常工作。

BTW: Closing Handle of a process works fine if I change the two lines above.

推荐答案

有几个基本问​​题在这里。首先你不叫 CloseHandle的有一个窗口句柄。它不是那种手柄。您可以使用 CloseHandle的当你有一个 HANDLE 而是 HWND 是不是 HANDLE 。如果你想消灭你需要调用一个窗口句柄的DestroyWindow 。

There are a couple of basic problems here. First of all you don't call CloseHandle with a window handle. It's not that kind of handle. You use CloseHandle when you have a HANDLE but an HWND is not a HANDLE. If you want to destroy a window handle you need to call DestroyWindow.

但是，<一个href=\"http://msdn.microsoft.com/en-us/library/windows/desktop/ms632682%28v=vs.85%29.aspx\">documentation为的DestroyWindow 规定：

一个线程不能使用的DestroyWindow销毁由不同的线程创建的窗口。

A thread cannot use DestroyWindow to destroy a window created by a different thread.

所以，你不能这样做，要么。

So you can't do that either.

你可以做的是发送 WM_CLOSE 消息窗口。这应该足以说服它正常关闭。

What you can do is to send a WM_CLOSE message to the window. That should be enough to persuade it to close gracefully.

注意 WM_CLOSE 发送，而不是公布。这可以通过这条线从<一可以看出端倪href=\"http://msdn.microsoft.com/en-us/library/windows/desktop/ms632617%28v=vs.85%29.aspx\">documentation:

Note that WM_CLOSE is sent rather than posted. This can be discerned by this line from the documentation:

一个窗口，通过它的WindowProc函数接收该消息。

A window receives this message through its WindowProc function.

更新

约翰Knoller指出，我misinter preting这是不写入涵盖其中一个应用程序尝试关闭其他应用程序的情况Windows文档。

John Knoller points out that I am misinterpreting the Windows documentation which was not written to cover the situation where one application attempts to close down another application.

约翰的建议是：

在事实上，它是个聪明的利用来发送 WM_CLOSE 到另一个进程 PostMessage的或 SendNotifyMessage 。如果你使用 SendMessage函数，你会如果过程是不抽的消息会被卡住。它甚至更好，使用 WM_SYSCOMMAND / SCCLOSE 这基本上是同样的事情点击窗口标题的关闭按钮。

In fact it's wiser to send WM_CLOSE to another process using PostMessage or SendNotifyMessage. If you use SendMessage, you will get stuck if the process isn't pumping messages. It's even better to use WM_SYSCOMMAND/SCCLOSE which is basically the same thing as clicking on the window caption's close button.

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