如何从HRESULT中获取错误代码 [英] How to get an error code out of an HRESULT

问题描述

这就是我所拥有的:

This is what I have:

CComQIPtr<ICSFTHST>	spHst;

HRESULT hr1  = CoCreateInstance(
    CClsid::m_CSFTHST, NULL, CLSCTX_LOCAL_SERVER, IID_ICSFTHST, 
    (void **)&spHst);

有时hr1是成功，有时是失败！

我一直在尝试各种方法来从hr1中获取错误代码，现在已经有好几天了，我感到非常沮丧.

如何从hr1中获取错误代码?请帮忙！

Sometimes hr1 is success and sometimes it''s failure!

I have been trying all ways to get the error code out of hr1, it''s been days now, and I am so frustated.

How do I get the error code out of hr1? Please help!

推荐答案

Raymond Chen曾就此发表过博客:

参见 http://blogs.msdn.com/b/oldnewthing/archive/2006 /11/03/942851.aspx [ ^ ]

Raymond Chen has blogged about this:

See http://blogs.msdn.com/b/oldnewthing/archive/2006/11/03/942851.aspx[^]

阅读^ ]关于HRESULT.

您可能可以使用 FormatMessage [ CoCreateInstance [ ^ ]

Read the article on MSDN[^] about HRESULT.

You may be able to use FormatMessage[^] to get error text (see the remarks section).

Or you can just check the return value with the MSDN docs for CoCreateInstance[^]

已经炒过了，但是运气还不高！！

* pdwWin32 = HRESULT_CODE(hr);

尝试了一切，终于有很大帮助！

CString sErrorMsg = _com_error(hr1).ErrorMessage();

但我想知道上面的声明总是返回操作成功完成"

可能-com-error与Andrew所说的有所不同，因为根据安德鲁(Andrew)给出的链接，

或者，您可以仅使用MSDN文档检查CoCreateInstance的返回值[^]

S_OK显示了不同的描述.

Already ried this one, but not much luck!!

*pdwWin32 = HRESULT_CODE(hr);

Tried everything, finally this is helping a lot!!

CString sErrorMsg = _com_error(hr1).ErrorMessage();

But i wonder the above statement is always returning "Operation completed sucessfully"

May be -com-error is different from what Andrew said, because according to the link andrew gave

Or you can just check the return value with the MSDN docs for CoCreateInstance[^]

S_OK shows a different description.

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