ActiveExtension.cs

using PX.Common;
using PX.Data.EP;
using PX.Data;
using PX.Objects.CM;
using PX.Objects.CR;
using PX.Objects.CS;
using PX.Objects.GL;
using PX.Objects;
using System.Collections.Generic;
using System;

namespace PX.Objects.GL
{
  [PXNonInstantiatedExtension]
  public class GL_Batch_ExistingColumn : PXCacheExtension<PX.Objects.GL.Batch>
  {
      #region Description  
      [PXUIField(DisplayName = "My Descr", Visibility = PXUIVisibility.Visible)]
      [PXDBString(255, IsUnicode = true)]
      [PXDefault]
      public string Description { get; set; }
      #endregion
        
      public static bool IsActive()
      {
        return PX.Data.Update.PXInstanceHelper.CurrentCompany == 2;
      }
  }
}