BSTR,_bstr_t,CComBSTR,VARIANT,_variant_t,CString的轉換

VC6.0上編譯通過，console程式，使用靜態MFC庫。也許有不對的地方，歡迎指正

#include <stdio.h>
#include <afx.h>
#include <comdef.h>
#include <atlbase.h>

void main()
{
    BSTR bstrText;
    _bstr_t _bstr_tText;
    CString cstrText;
    LPTSTR pText;
    CComBSTR ccomstrText;
    VARIANT variantText;
    _variant_t _variant_tText;

 

    //char*轉成其他類型
    _bstr_tText = "系統設定";
    bstrText = _com_util::ConvertStringToBSTR("通道設定");
        SysFreeString(bstrText);    //必須釋放
    cstrText = "使用者管理";
    ccomstrText = "日誌管理";
    variantText.vt = VT_BSTR;
    variantText.bstrVal = _com_util::ConvertStringToBSTR("jinan1861");
    _variant_tText = "警示管理";

    //BSTR轉成其他類型
    bstrText = _com_util::ConvertStringToBSTR("通道設定");
    cstrText = bstrText;
    _bstr_tText = bstrText;
    ccomstrText = bstrText;
    variantText.vt = VT_BSTR;
    variantText.bstrVal = bstrText;
    _variant_tText = bstrText;
    pText = _com_util::ConvertBSTRToString(bstrText);
    SysFreeString(bstrText);
    delete(pText);                    //需要delete

    //_bstr_t轉成其他類型
    _bstr_tText = "系統設定";
    cstrText = (LPCTSTR)_bstr_tText;
    bstrText = (BSTR)_bstr_tText;
    pText = (char*)_bstr_tText;
    ccomstrText = (BSTR)_bstr_tText;
    variantText.vt = VT_BSTR;
    variantText.bstrVal = (BSTR)_bstr_tText;
    _variant_tText = _bstr_tText;

    //Cstring轉成其他類型
    cstrText = "日誌管理";
    LPCTSTR pText1 = (LPCTSTR)cstrText;
    bstrText = _com_util::ConvertStringToBSTR( (LPCTSTR)cstrText );
    variantText.vt = VT_BSTR;
    variantText.bstrVal = bstrText;
    SysFreeString(bstrText);
    _bstr_tText = cstrText;
    ccomstrText = cstrText;
    _variant_tText = (LPCTSTR)cstrText;

    //ccomstrText轉成其他類型
    ccomstrText = "使用者管理";
    cstrText = ccomstrText;
    _bstr_tText = ccomstrText;
    bstrText = ccomstrText;
    pText1 = (LPCTSTR)cstrText;
    variantText.vt = VT_BSTR;
    variantText.bstrVal = (BSTR)ccomstrText;
    _variant_tText = (BSTR)ccomstrText;

    //VARIANT轉成其他類型
    if (variantText.vt == VT_BSTR)
    {
        //variantText.bstrVal是BSTR類型，參考BSTR的轉換方法
    }

    //_variant_t是VARIANT的封裝類，
    //建構函式和操作符'='支援VARIANT，_bstr_t和LPTSTR
    //_variant_t轉成其他類型
    _variant_tText = "抓圖管理";
    _bstr_tText = (_bstr_t)_variant_tText;
    cstrText = (LPCTSTR)_bstr_tText;
    pText1 = (char*)_bstr_tText;
    bstrText = (_bstr_t)_variant_tText;
    _bstr_tText = _variant_tText;
    ccomstrText = (BSTR)_bstr_tText;
    variantText = _variant_tText;

    getchar();

}