Printf() debugging in a console window from within an ActiveX control

使用Printf（）在控制台窗口中调试activex控件

文章来自：

http://www.codeproject.com/Articles/11420/Printf-debugging-in-a-console-window-from-within-a

Introduction

OK, here's the deal... In the process of developing an ActiveX control for inclusion in a browser, I had developed a need to watch a large amount of data. It became very cumbersome to use the standard breakpoint debugging, and to make matters worse, the control was misbehaving on a remote machine.

在开发浏览器使用的activex控件的过程中，我需要监测许多数据。使用标准断点会变得很笨重，而且事情会变得更糟糕，控件在远程的机器上会表现异常。

Needing to be able to see the data easily, I decided to see if it was possible to create a console window from within the control. A web search didn't turn up anything as far as I could see so I decided to try a quick test.

我所需要的是很容易监测数据，我决定看下是否有可能从控件中创建一个控制台窗口。我在网上并没有找到答案，决定自己试验一下。

As it turns out, it was quite simple to do. To do printf() debugging from within a control, all you need to do is modify your OnCreate() method as follows:

结果证明，它是很容易实现的。为了可以在控件中使用printf()，你所需要的就是按照如下修改oncreate（）：

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 LRESULT OnCreate(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled) {  // TODO : Add Code for message handler.  // Call DefWindowProc if necessary.   /* create a seperate console window for     printf (print, println and debug) output */  AllocConsole();  freopen ("CONOUT$", "w", stdout );   return 0; }

You'll also need to include the appropriate headers <stdio.h> and you should now be able to use printf() from anywhere in your code.

你应该包括<stdio.h>并且可以在任何地方使用printf()函数。

There are certainly other methods of tracing output... but this is guaranteed to be available and viewable on machines that don't have any tools installed.

应该有其他方法跟踪输出，但是这个可以确保不需要其他工具就能使用。

Note: although I haven't done it, it should also be possible to remap stdin and take input from the console window should you need to implement a simple debug console.

注释：虽然我没有试验，它应该可以重映射stdin并且可以从控制台窗口获取输入信息。

Just another one for the toolkit... use it as you will.