ATL如何将BSTR * str转换为注册表项.SetValue（LPCTSTR str类型 [英] ATL how to Convert BSTR* str to registry key.SetValue(LPCTSTR str type

问题描述

我已经做了C ++多年了，更不用说ATL代码了

It's been years since I have done C++ let alone ATL code

我有这种方法需要手术帮助：（

I have this method that needs surgical help :(

这是针对移动应用程序的，因此我不想使用CString和MFC

This is for a mobile app so I don't want to use CString and MFC

我需要将BSTR * str转换为正确的类型LPCTSTR在注册表中使用Set.Value方法

I need to convert the BSTR* str to the correct type LPCTSTR for use in the registry Set.Value method

STDMETHODIMP CAXSampleCtl::SendMSG(BSTR* str)
{
    CRegKey key;

    key.Create(HKEY_LOCAL_MACHINE, _T("MyKeyName"));

    key.SetValue( str <<<--- nope, _T("MyValueName"));

    key.Flush();

    key.Close();

    return S_OK;
}

推荐答案

COLE2T 宏只适合您，请参见字符串转换类和宏

COLE2T macro is just for you, see String Conversion Classes and Macros

要转换为BSTR，请将现有字符串传递给constructo
CComBSTR的r。要从BSTR进行转换，请使用COLE2 [C] DestinationType [EX]，
（例如COLE2T）。

To convert to a BSTR, pass the existing string to the constructor of CComBSTR. To convert from a BSTR, use COLE2[C]DestinationType[EX], such as COLE2T.

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