Public Overloads Function OpenExcel( _
   ByVal stream As Stream, _
   ByVal password As String _
) As Boolean

Dim instance As FpSpread
Dim stream As Stream
Dim password As String
Dim value As Boolean
 
value = instance.OpenExcel(stream, password)

public bool OpenExcel( 
   Stream stream,
   string password
)

string f;
f = "D:\\savetostream.xls";
System.IO.FileStream s = new System.IO.FileStream(f, System.IO.FileMode.Open, System.IO.FileAccess.ReadWrite);
try
{
    fpSpread1.OpenExcel(s, "test");
}
catch (Exception ex)
{
    MessageBox.Show(ex.Message);
}

Dim f As String
f = "D:\savetostream.xls"
Dim s As New System.IO.FileStream(f, IO.FileMode.Open, IO.FileAccess.ReadWrite)
Try     
FpSpread1.OpenExcel(s, "test")     
Catch ex As Exception     
MessageBox.Show(ex.Message)
End Try