private void this_CollectionChange(Object sender, CollectionChangeEventArgs e)
        {
            if (this.AutoToolTip)
                this.toolTipText = SysLib.GetToolTipText(this, "Text");

            // .......... MaxLength
            if (AutoMaxLength && e != null && e.Action == CollectionChangeAction.Add)
            {
                int bindedFieldMaxLength = this.MaxLength;

                Binding bindingObj = (e.Element as Binding);

                if (bindingObj != null)
                {
                    if (bindingObj.DataSource != null &&
                        bindingObj.BindingMemberInfo != null)
                    {
                        DataTable sourceTable = null;
                        DataView sourceView = null;
                        BindingMemberInfo bindingMemberInfoObj =
                           bindingObj.BindingMemberInfo;

                        if (bindingObj.DataSource is BindingSource)
                        {
                            if ((bindingObj.DataSource as BindingSource).List != null)
                            {
                                sourceView = ((bindingObj.DataSource as BindingSource).List as DataView);
                                sourceTable = ((bindingObj.DataSource as BindingSource).List as DataTable);
                            }
                        }
                        else
                        {
                            sourceView = (bindingObj.DataSource as DataView);
                            sourceTable = (bindingObj.DataSource as DataTable);
                        }

                        if ((sourceTable != null || sourceView != null) &&  //----||
                             bindingMemberInfoObj != null)
                        {

                            string bindedFieldName = bindingMemberInfoObj.BindingField;
                            if (!string.IsNullOrEmpty(bindedFieldName))
                            {

                                if (sourceTable != null &&
                                     sourceTable.Columns[bindedFieldName].MaxLength > 0)
                                {
                                    bindedFieldMaxLength =
                                       sourceTable.Columns[bindedFieldName].MaxLength;
                                }
                                if (sourceView != null &&
                                   sourceView.Table.Columns[bindedFieldName].MaxLength > 0)
                                {
                                    bindedFieldMaxLength =
                                       sourceView.Table.Columns[bindedFieldName].MaxLength;
                                }
                                if (this.MaxLength != bindedFieldMaxLength)
                                {
                                    this.MaxLength = bindedFieldMaxLength;
                                }
                            }
                        }
                    }
                }
            }
        }