int bt7274(const char* aaa)
[DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError=true)]
static extern uint GetShortPathName(
[MarshalAs(UnmanagedType.LPTStr)]
string lpszLongPath,
[MarshalAs(UnmanagedType.LPTStr)]
StringBuilder lpszShortPath,
uint cchBuffer);