Trace in visual studio

include : windows.h, stdio.h, stdarg.h

void Trace ( char *_format, ... )
{
 va_list args;
 va_start ( args, _format );
 int len = _vscprintf ( _format, args ) + 1;
 char *str = new char[len];
 vsprintf_s ( str, len, _format, args );
 va_end ( args );
 int dsize = MultiByteToWideChar ( CP_ACP, 0, str, -1, NULL, NULL );
 WCHAR *des = new WCHAR[dsize];
 MultiByteToWideChar ( CP_ACP, 0, str, dsize, des, dsize );
 OutputDebugString ( des );
 delete[] des;
 delete[] str;
}