트레이스

void RetailOutput(TCHAR *szFormat, ...)
{
    TCHAR szBuffer[1024];  // Large buffer for long filenames or URLs
    const size_t NUMCHARS = sizeof(szBuffer) / sizeof(szBuffer[0]);
    const int LASTCHAR = NUMCHARS - 1;

    // Format the input string
    va_list pArgs;
    va_start(pArgs, szFormat);

    // Use a bounded buffer size to prevent buffer overruns.  Limit count to
    // character size minus one to allow for a NULL terminating character.
    _vsntprintf(szBuffer, NUMCHARS - 1, szFormat, pArgs);
    va_end(pArgs);

    // Ensure that the formatted string is NULL-terminated
    szBuffer[LASTCHAR] = TEXT('\0');

    OutputDebugString(szBuffer);
//    MessageBox(NULL, szBuffer, TEXT("..."), MB_OK);
}
/*

#include <stdio.h>

void Trace(char* szFormat, ...)
{
    char szTempBuf[2048] ;
    va_list vlMarker ;

    va_start(vlMarker,szFormat) ;
    vsprintf(szTempBuf,szFormat,vlMarker) ;
    va_end(vlMarker) ;

    OutputDebugString(szTempBuf) ;
}

*/

    CEdit    m_editProgress;

    afx_msg void OnMaxtextProgress();


void CUrlFileDlg::DoDataExchange(CDataExchange* pDX)
{
    CDialog::DoDataExchange(pDX);
    //{{AFX_DATA_MAP(CUrlFileDlg)
    ...
    DDX_Control(pDX, IDC_PROGRESS, m_editProgress);
    //}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CUrlFileDlg, CDialog)
    //{{AFX_MSG_MAP(CUrlFileDlg)
    ...
    ON_EN_MAXTEXT(IDC_PROGRESS, OnMaxtextProgress)
    //}}AFX_MSG_MAP
END_MESSAGE_MAP()

...
void CUrlFileDlg::OnMaxtextProgress()
{
    // TODO: Add your control notification handler code here
    m_editProgress.SetWindowText(NULL);
}


    // place a caret at the end of the text and append the text to the edit box
    const int nLen = m_editProgress.GetWindowTextLength();
    m_editProgress.SetSel(nLen, nLen);
    m_editProgress.ReplaceSel(strStatus);

참조 사이트:

http://madchick.egloos.com/744945
http://madchick.egloos.com/1262291
http://www.debuglab.com/knowledge/filetrace.html
http://jjjryu.tistory.com/entry/%EB%A1%9C%EA%B7%B8-Win32