PVS-Studio warning V510 for webem

wstring myDBFName;
...
void CSQLiteDatabase::Open()
{
  int rc = sqlite3_open16(myDBFName.c_str(), &db);
  if( rc ) {
    printf("Cannot open database %s",myDBFName);
    exit(1);
  }
}

1) wprintf should be used. 2) .c_str() is missing.

This suspicious code was found in webem project by PVS-Studio static code analyzer.
Warning message is:
V510 The 'printf' function is not expected to receive class-type variable as second actual argument. Examples SQLiteDatabase.cpp 39

PVS-Studio is a static analyzer for detecting bugs in the source code of applications written in C, C++, C++11, C++/CX. Site: http://www.viva64.com/en/pvs-studio/