PROGDLG dwFlags,  //DWORD

        /// <param name="dwLineNum">The line number on which the text is to be displayed. Currently there are three lines—1, 2, and 3. If the PROGDLG_AUTOTIME flag was included in the dwFlags parameter when IProgressDialog::StartProgressDialog was called, only lines 1 and 2 can be used. The estimated time will be displayed on line 3.</param>

PROGDLG, PDTIMER, PathCompactPath

pd.StartProgressDialog(this.Handle, null, PROGDLG.Modal | PROGDLG.AutoTime | PROGDLG.NoMinimize, IntPtr.Zero);

public enum PROGDLG : uint //DWORD

Public Enum PROGDLG As UInteger