You can use also a CString class in MFC:

CString szFile;
szFile.Format("portlog%d.dbf", i);
AfxMessageBox(szFile);

>Hi, when i try to convert int to char with _itoa, dont work in my machine, exist a different way for do this job?
>
>this is my code:
>
>char szFile[12] = "";
>char buffer[33];
>int i = 0;
>_itoa(i,buffer,10);
>lstrcat( szFile, "portlog");
>lstrcat( szFile, buffer);
>lstrcat( szFile, ".dbf");
>//lstrcpy(szFile,szFile);
>AfxMessageBox(szFile);