Visual Basic

Public int Update_Data(String Grade,String Stream ,String Name )
{
 
     con =new OleDbCommand(strcon);
     
     cmd1 = new OleDbCommand();
     cmd1.CommandText = "Update table2 set grade=? And Stream = ? where Name = ?";
     cmd1.Connection = con;
     cmd1.Parameters.Add("@Grade",SqlDbType.NVarChar, 63).Value = Grade;
     cmd1.Parameters.Add("@Stream ",SqlDbType.NVarChar, 63).Value = Stream ;
     cmd1.Parameters.Add("@Name ",SqlDbType.NVarChar, 63).Value = Name ;
     int Results = 0;

     try
     { 
             Con.Open();
                
        Results = cmd1.ExecuteNonQuery();

      }
      catch(SqlException)
        {
          throw;
        }
        finally
            {
                if (con != null)
                {
                    con.Close();
                }

            }
            return Results ;
        }

Convert.ToInt32(TextBox1.Text);

******This is your windows application or class library project, but it should be "Public Module"******
Public Module TestModule
    Public Sub Test()
        MsgBox("Test successfully completed")
    End Sub
End Module

******Below Code to your Current Project******
Imports System.Reflection

******Use the below code at any event or funtions******
Dim Path As String = "......\"
Dim FileName As String = "XXXX.dll" 'Or "XXXX.exe"
Dim FileAssembly As Assembly = Reflection.Assembly.LoadFile(Path & FileName)
Dim ModuleName As String = "TestModule"
Dim SubName As String = "Test"
Dim RefType As Type = FileAssembly.GetType(FileAssembly.GetName.Name & "." & ModuleName)
Dim MyForm As Form = New Form
RefType.InvokeMember(SubName, BindingFlags.InvokeMethod, Nothing, MyForm, Nothing)