VC RichEdit中英文关键字标红

最近需要做vc的RichEdit控件里的内容关键字标红，由于RichEdit的内容可能是中英文混合的，所以需要先转成Unicode，再用wcsstr函数找到关键字出现的位置，再用SetSel、SelSelectionCharFormat方法进行标红。

//CString m_richText; RichEdit内容

//CString strKeyword; 关键字

CHARFORMAT cf;

    ZeroMemory(&cf, sizeof(CHARFORMAT));

    cf.dwMask = CFM_STRIKEOUT|CFM_BOLD | CFM_COLOR;

    cf.dwEffects = CFE_BOLD;

    cf.crTextColor = RGB(,,);

    richFileContext.GetWindowText(m_richText);

    if(m_richText.GetLength()<= || strKeyword.GetLength()<=)

    {

        return;

    }

    char *pstrRichText = m_richText.GetBuffer();

    char *pstrKeyword = strKeyword.GetBuffer();

    wchar_t w_richtext[]={},w_keyword[]={};

    MByteToWChar(pstrRichText,w_richtext,sizeof(w_richtext)/sizeof(w_richtext[]));

    MByteToWChar(pstrKeyword,w_keyword,sizeof(w_keyword)/sizeof(w_keyword[]));

    wchar_t *p = wcsstr(w_richtext,w_keyword);

    while(p)

    {

        int nIndex = p-w_richtext;

        int selIndex = nIndex;

        //每换行一次selIndex需要减1，不知道为啥，反复debug出的经验

        for(int i=;i<richFileContext.GetLineCount();i++)

        {

            int lineIndex = richFileContext.LineIndex(i);

            if(nIndex>lineIndex)

            {

                selIndex--;

            }

            else

            {

                break;

            }

        }

        ////////////////////////////////////////

        richFileContext.SetSel(selIndex,selIndex+wcslen(w_keyword));

        richFileContext.SetSelectionCharFormat(cf);

        richFileContext.SetSel(-,-);

        p = wcsstr(w_richtext+nIndex+wcslen(w_keyword),w_keyword);

    }

其中MByteToWChar如下：

//-------------------------------------------------------------------------------------

//Description:

// This function maps a character string to a wide-character (Unicode) string

//

//Parameters:

// lpcszStr: [in] Pointer to the character string to be converted

// lpwszStr: [out] Pointer to a buffer that receives the translated string.

// dwSize: [in] Size of the buffer

//

//Return Values:

// TRUE: Succeed

// FALSE: Failed

//

//Example:

// MByteToWChar(szA,szW,sizeof(szW)/sizeof(szW[0]));

//---------------------------------------------------------------------------------------

BOOL MByteToWChar(LPCSTR lpcszStr, LPWSTR lpwszStr, DWORD dwSize)

{

    // Get the required size of the buffer that receives the Unicode

    // string.

    DWORD dwMinSize;

    dwMinSize = MultiByteToWideChar (CP_ACP, , lpcszStr, -, NULL, );

    if(dwSize < dwMinSize)

    {

        return FALSE;

    }

    // Convert headers from ASCII to Unicode.

    MultiByteToWideChar (CP_ACP, , lpcszStr, -, lpwszStr, dwMinSize);

    return TRUE;

}