[DllImport("msi.dll", CharSet = CharSet.Auto)]
public static extern int MsiGetTargetPath(
[MarshalAs(UnmanagedType.LPTStr)] string szProduct,
[MarshalAs(UnmanagedType.LPTStr)] string szFeature,
[MarshalAs(UnmanagedType.LPTStr)] StringBuilder szPathBuf,
ref int pcchBuf
);