function IsColorStored: Boolean;
    function IsDblClickNextValStored: Boolean;
    function IsDropDownShowTitlesStored: Boolean;
    function IsDropDownSizingStored: Boolean;
    function IsEndEllipsisStored: Boolean;
    function IsFontStored: Boolean;
    function IsImeModeStored: Boolean;
    function IsImeNameStored: Boolean;
    function IsIncrementStored: Boolean;
    function IsReadOnlyStored: Boolean;
    function IsToolTipsStored: Boolean;
    function IsWidthStored: Boolean;
    procedure EditButtonChanged(Sender: TObject);
    procedure ImageListChange(Sender: TObject);
    procedure FontChanged(Sender: TObject);
    procedure SetBiDiMode(Value: TBiDiMode);
    procedure SetButtonStyle(Value: TColumnButtonStyleEh);
    procedure SetCheckboxes(const Value: Boolean);
    procedure SetCheckboxState(const Value: TCheckBoxState);
    procedure SetColor(Value: TColor);
    procedure SetDblClickNextVal(const Value: Boolean);
    procedure SetDisplayFormat(const Value: string);
    procedure SetDropDownBox(const Value: TColumnDropDownBoxEh);
    procedure SetDropDownShowTitles(const Value: Boolean);
    procedure SetDropDownSizing(const Value: Boolean);
    procedure SetDropDownSpecRow(const Value: TSpecRowEh);
    procedure SetEditButtons(const Value: TEditButtonsEh);
    procedure SetEditMask(const Value: string);
    procedure SetFieldName(const Value: String);
    procedure SetFont(Value: TFont);
    procedure SetFooter(const Value: TColumnFooterEh);
    procedure SetFooters(const Value: TColumnFootersEh);
    procedure SetImageList(const Value: TCustomImageList);
    procedure SetKeykList(const Value: TStrings);
    procedure SetLayout(Value: TTextLayout);
    procedure SetMaxWidth(const Value: Integer);
    procedure SetMinWidth(const Value: Integer);
    procedure SetMRUList(const Value: TMRUListEh);
    procedure SetNotInKeyListIndex(const Value: Integer);
    procedure SetOnDropDownBoxCheckButton(const Value: TCheckTitleEhBtnEvent);
    procedure SetOnDropDownBoxDrawColumnCell(const Value: TDrawColumnEhCellEvent);
    procedure SetOnDropDownBoxGetCellParams(const Value: TGetCellEhParamsEvent);
    procedure SetOnDropDownBoxSortMarkingChanged(const Value: TNotifyEvent);
    procedure SetOnDropDownBoxTitleBtnClick(const Value: TTitleEhClickEvent);
    procedure SetOnGetCellParams(const Value: TGetColCellParamsEventEh);
    procedure SetPickList(Value: TStrings);
    procedure SetPopupMenu(Value: TPopupMenu);
    procedure SetShowImageAndText(const Value: Boolean);
    procedure SetSTFilter(const Value: TSTColumnFilterEh);
    procedure SetTitle(Value: TColumnTitleEh);
    procedure SetToolTips(const Value: Boolean);
    procedure SetVisible(const Value: Boolean);
  protected
    FAlwaysShowEditButton: Boolean;
    FAutoDropDown: Boolean;
    FAutoFitColWidth: Boolean;
    FDataList: TCustomDBGridEh;
    FDropDownWidth: Integer;
    FDTListSource: TDataSource;
    FEndEllipsis: Boolean;
    FInitWidth: Integer;
    FLookupDisplayFields: String;
    FWordWrap: Boolean;
    function AllowableWidth(TryWidth: Integer): Integer;
    function CreateEditButtons: TEditButtonsEh; virtual;
    function CreateFooter: TColumnFooterEh; virtual;
    function CreateFooters: TColumnFootersEh; virtual;
    function CreateSTFilter: TSTColumnFilterEh; virtual;
    function CreateTitle: TColumnTitleEh; virtual;
    function DefaultAlwaysShowEditButton: Boolean;
    function DefaultAutoDropDown: Boolean;
    function DefaultDblClickNextVal: Boolean;
    function DefaultDropDownShowTitles: Boolean;
    function DefaultDropDownSizing: Boolean;
    function DefaultEndEllipsis: Boolean;
    function DefaultHighlightRequired: Boolean;
    function DefaultLayout: TTextLayout;
    function DefaultLookupDisplayFields: String;
    function DefaultToolTips: Boolean;
    function DefaultWordWrap: Boolean;
    function GetAutoFitColWidth: Boolean;
    function GetDisplayName: string; override;
    function GetGrid: TCustomDBGridEh;
    function GetLookupDisplayFields: String;
    function GetWordWrap: Boolean;
    function IsHighlightRequiredStored: Boolean;
    function IsLayoutStored: Boolean;
    function IsLookupDisplayFieldsStored: Boolean;
    function IsWordWrapStored: Boolean;
    function SeenPassthrough: Boolean; virtual;
    function UsedLookupDataSet: TDataSet;
    procedure Changed(AllItems: Boolean);
    function FullListDataSet: TDataSet;
    procedure EnsureSumValue;
    procedure RefreshDefaultFont;
    procedure SetAlignment(Value: TAlignment); virtual;
    procedure SetAlwaysShowEditButton(Value: Boolean);
    procedure SetAutoDropDown(Value: Boolean);
    procedure SetAutoFitColWidth(Value: Boolean); virtual;
    procedure SetDropDownWidth(Value: Integer);
    procedure SetEndEllipsis(const Value: Boolean);
    procedure SetField(Value: TField); virtual;
    procedure SetHideDuplicates(Value: Boolean); virtual;
    procedure SetHighlightRequired(Value: Boolean); virtual;
{$IFDEF EH_LIB_VCL}
    procedure SetImeMode(Value: TImeMode); virtual;
    procedure SetImeName(Value: TImeName); virtual;
{$ENDIF}
    procedure SetIndex(Value: Integer); override;
    procedure SetLookupDisplayFields(Value: String); virtual;
    procedure SetNextFieldValue(Increment: Extended);
    procedure SetReadOnly(Value: Boolean); virtual;
    procedure SetWidth(Value: Integer); virtual;
    procedure SetWordWrap(Value: Boolean); virtual;
    procedure SpecRowChanged(Sender: TObject); virtual;
    procedure UpdateDataValues(Text: String; Value: Variant; UseText: Boolean);
    property IsStored: Boolean read FStored write FStored default True;
    property FieldValueList: IMemTableDataFieldValueListEh read FFieldValueList write FFieldValueList;
  protected
    { ILookupGridOwner }
    procedure SetDropDownBoxListSource(AListSource: TDataSource);
    procedure ILookupGridOwner.SetListSource = SetDropDownBoxListSource;
    function GetLookupGrid: TCustomDBGridEh;
    function GetOptions: TDBLookupGridEhOptions;
    procedure SetOptions(Value: TDBLookupGridEhOptions);
{$IFNDEF CIL}
    { IInterface }
    function QueryInterface(const IID: TGUID; out Obj): HResult; virtual; stdcall;
    function _AddRef: Integer; stdcall;
    function _Release: Integer; stdcall;
{$ENDIF}
  public
    constructor Create(Collection: TCollection); override;
    destructor Destroy; override;
    function CanModify(TryEdit: Boolean): Boolean;
    function DefaultAlignment: TAlignment;
    function DefaultColor: TColor;
    function DefaultFont: TFont;
{$IFDEF EH_LIB_VCL}
    function DefaultImeMode: TImeMode;
    function DefaultImeName: TImeName;
{$ENDIF}
    function DefaultReadOnly: Boolean;
    function DefaultWidth: Integer;
    function DisplayText: String;
    function DrawTextBiDiModeFlagsReadingOnly: Longint;
    function UseRightToLeftAlignment: Boolean; virtual;
    function UseRightToLeftReading: Boolean;
    function UseRightToLeftScrollBar: Boolean;
    function EditButtonsWidth: Integer;
    function GetColumnType: TColumnEhType;
    function GetImageIndex: Integer;
    function UsedFooter(Index: Integer): TColumnFooterEh;

    procedure Assign(Source: TPersistent); override;
    procedure DropDown;
    procedure FillColCellParams(ColCellParamsEh: TColCellParamsEh);
    procedure GetColCellParams(EditMode: Boolean; ColCellParamsEh: TColCellParamsEh); virtual;
    procedure OptimizeWidth; virtual;
    procedure RestoreDefaults; virtual;
    property AssignedValues: TColumnEhValues read FAssignedValues;
    property CheckboxState: TCheckBoxState read GetCheckboxState write SetCheckboxState;
    property DataList: TCustomDBGridEh read GetDataList;
    property Field: TField read GetField write SetField;
    property Grid: TCustomDBGridEh read GetGrid;
  public
    property Alignment: TAlignment read GetAlignment write SetAlignment stored IsAlignmentStored;
    property AlwaysShowEditButton: Boolean read GetAlwaysShowEditButton write SetAlwaysShowEditButton stored IsAlwaysShowEditButtonStored;
    property AutoDropDown: Boolean read GetAutoDropDown write SetAutoDropDown stored IsAutoDropDownStored;
    property AutoFitColWidth: Boolean read GetAutoFitColWidth write SetAutoFitColWidth default True;
    property ButtonStyle: TColumnButtonStyleEh read FButtonStyle write SetButtonStyle default cbsAuto;
    property Checkboxes: Boolean read GetCheckboxes write SetCheckboxes stored IsCheckboxesStored;
    property Color: TColor read GetColor write SetColor stored IsColorStored;
    property BiDiMode: TBiDiMode read GetBiDiMode write SetBiDiMode stored IsBiDiModeStored;
    property DblClickNextVal: Boolean read GetDblClickNextVal write SetDblClickNextVal stored IsDblClickNextValStored;
    property DisplayFormat: string read FDisplayFormat write SetDisplayFormat;
    property DropDownBox: TColumnDropDownBoxEh read FDropDownBox write SetDropDownBox;
    property DropDownRows: Cardinal read FDropDownRows write FDropDownRows default 7; // obsolete
    property DropDownShowTitles: Boolean read GetDropDownShowTitles write SetDropDownShowTitles stored IsDropDownShowTitlesStored;
    property DropDownSizing: Boolean read GetDropDownSizing write SetDropDownSizing stored IsDropDownSizingStored;
    property DropDownSpecRow: TSpecRowEh read FDropDownSpecRow write SetDropDownSpecRow;
    property DropDownWidth: Integer read FDropDownWidth write SetDropDownWidth default 0;
    property EditButtons: TEditButtonsEh read FEditButtons write SetEditButtons;
    property EditMask: string read FEditMask write SetEditMask;
    property EndEllipsis: Boolean read GetEndEllipsis write SetEndEllipsis stored IsEndEllipsisStored;
    property FieldName: String read FFieldName write SetFieldName;
    property Font: TFont read GetFont write SetFont stored IsFontStored;
    property Footer: TColumnFooterEh read FFooter write SetFooter;
    property Footers: TColumnFootersEh read FFooters write SetFooters;
    property HideDuplicates: Boolean read FHideDuplicates write SetHideDuplicates default False;
    property HighlightRequired: Boolean read GetHighlightRequired write SetHighlightRequired stored IsHighlightRequiredStored;
    property ImageList: TCustomImageList read FImageList write SetImageList;
{$IFDEF EH_LIB_VCL}
    property ImeMode: TImeMode read GetImeMode write SetImeMode stored IsImeModeStored;
    property ImeName: TImeName read GetImeName write SetImeName stored IsImeNameStored;
{$ENDIF}
    property Increment: Extended read FIncrement write FIncrement stored IsIncrementStored;
    property KeyList: TStrings read GetKeykList write SetKeykList;
    property LookupDisplayFields: String read GetLookupDisplayFields write SetLookupDisplayFields stored IsLookupDisplayFieldsStored;
    property Layout: TTextLayout read GetLayout write SetLayout stored IsLayoutStored;
    property MaxWidth: Integer read FMaxWidth write SetMaxWidth default 0;
    property MinWidth: Integer read FMinWidth write SetMinWidth default 0;
    property MRUList: TMRUListEh read FMRUList write SetMRUList;
    property NotInKeyListIndex: Integer read FNotInKeyListIndex write SetNotInKeyListIndex default -1;
    property PickList: TStrings read GetPickList write SetPickList;
    property PopupMenu: TPopupMenu read FPopupMenu write SetPopupMenu;
    property ReadOnly: Boolean read GetReadOnly write SetReadOnly stored IsReadOnlyStored;
    property STFilter: TSTColumnFilterEh read FSTFilter write SetSTFilter;
    property ShowImageAndText: Boolean read GetShowImageAndText write SetShowImageAndText default False;
    property Tag: Longint read FTag write FTag default 0;
    property Title: TColumnTitleEh read FTitle write SetTitle;
    property ToolTips: Boolean read GetToolTips write SetToolTips stored IsToolTipsStored;
    property Visible: Boolean read FVisible write SetVisible default True;
    property Width: Integer read GetWidth write SetWidth stored IsWidthStored;
    property WordWrap: Boolean read GetWordWrap write SetWordWrap stored IsWordWrapStored;
    property OnCheckDrawRequiredState: TOnColumnCheckDrawRequiredStateEventEh read FOnCheckDrawRequiredState write FOnCheckDrawRequiredState;
    property OnDropDownBoxCheckButton: TCheckTitleEhBtnEvent
      read GetOnDropDownBoxCheckButton write SetOnDropDownBoxCheckButton;
    property OnDropDownBoxDrawColumnCell: TDrawColumnEhCellEvent
      read GetOnDropDownBoxDrawColumnCell write SetOnDropDownBoxDrawColumnCell;
    property OnDropDownBoxGetCellParams: TGetCellEhParamsEvent
      read GetOnDropDownBoxGetCellParams write SetOnDropDownBoxGetCellParams;
    property OnDropDownBoxSortMarkingChanged: TNotifyEvent
      read GetOnDropDownBoxSortMarkingChanged write SetOnDropDownBoxSortMarkingChanged;
    property OnDropDownBoxTitleBtnClick: TTitleEhClickEvent
      read GetOnDropDownBoxTitleBtnClick write SetOnDropDownBoxTitleBtnClick;
    property OnEditButtonClick: TButtonClickEventEh read FOnButtonClick write FOnButtonClick;
    property OnEditButtonDown: TButtonDownEventEh read FOnButtonDown write FOnButtonDown;
    property OnGetCellParams: TGetColCellParamsEventEh read FOnGetCellParams write SetOnGetCellParams;
//    property OnGetItemImageIndex: TListGetImageIndexEventEh read FOnGetItemImageIndex write FOnGetItemImageIndex;
    property OnNotInList: TNotInListEventEh read FOnNotInList write FOnNotInList;
    property OnUpdateData: TColCellUpdateDataEventEh read FUpdateData write FUpdateData;
  end;

  TColumnEhClass = class of TColumnEh;

  TDBGridColumnEh = class(TColumnEh)
  published
    property Alignment;
    property AlwaysShowEditButton;
    property AutoDropDown;
    property AutoFitColWidth;
    property BiDiMode;
    property ButtonStyle;
    property Checkboxes;
    property Color;
    property DblClickNextVal;
    property DisplayFormat;
    property DropDownBox;
    property DropDownRows;
    property DropDownShowTitles;
    property DropDownSizing;
    property DropDownSpecRow;
    property DropDownWidth;
    property EditButtons;
    property EditMask;
    property EndEllipsis;
    property FieldName;
    property Font;
    property Footer;
    property Footers;
    property HideDuplicates;
    property HighlightRequired;
    property ImageList;
{$IFDEF EH_LIB_VCL}
    property ImeMode;
    property ImeName;
{$ENDIF}
    property Increment;
    property KeyList;
    property Layout;
    property LookupDisplayFields;
    property MaxWidth;
    property MinWidth;
    property MRUList;
    property NotInKeyListIndex;
    property PickList;
    property PopupMenu;
    property ReadOnly;
    property ShowImageAndText;
    property STFilter;
    property Tag;
    property Title;
    property ToolTips;
    property Visible;
    property Width;
    property WordWrap;
    property OnCheckDrawRequiredState;
    property OnDropDownBoxCheckButton;
    property OnDropDownBoxDrawColumnCell;
    property OnDropDownBoxGetCellParams;
    property OnDropDownBoxSortMarkingChanged;
    property OnDropDownBoxTitleBtnClick;
    property OnEditButtonClick;
    property OnEditButtonDown;
    property OnGetCellParams;
//    property OnGetItemImageIndex;
    property OnNotInList;
    property OnUpdateData;
  end;

{ TDBGridColumnsEh }

  TDBGridColumnsEh = class(TCollection)
  private
    FGrid: TCustomDBGridEh;
    function GetColumn(Index: Integer): TColumnEh;
    function GetState: TDBGridColumnsState;
    function InternalAdd: TColumnEh;
    procedure SetColumn(Index: Integer; Value: TColumnEh);