Public Overloads Function OpenExcel( _
   ByVal stream As Stream, _
   ByVal warningList As ExcelWarningList _
) As Boolean

Dim instance As FpSpread
Dim stream As Stream
Dim warningList As ExcelWarningList
Dim value As Boolean
 
value = instance.OpenExcel(stream, warningList)

public bool OpenExcel( 
   Stream stream,
   ExcelWarningList warningList
)

string f;
f = "D:\\formula1.xls"; 
System.IO.FileStream s = new System.IO.FileStream(f, IO.FileMode.Open, IO.FileAccess.ReadWrite);
if(!IsPostBack)
{
     FpSpread1.OpenExcel(s);
}

Dim f As String
f = "D:\mptest.xls"
Dim s As New System.IO.FileStream(f, IO.FileMode.Open, IO.FileAccess.ReadWrite)
If Not IsPostBack Then
     FpSpread1.OpenExcel(s, New FarPoint.Excel.ExcelWarningList)
End If