TDBMemo

type TDBMemo = class(TCustomMemo)

protected

  function GetReadOnly; override;

GetReadOnly - returns the boolean ReadOnly status

  procedure SetReadOnly(); override;

SetReadOnly - specifies whether ReadOnly applies

  procedure DataChange(); virtual;

DataChange - if Data changed, loads the new data into the appropriate part of the Field

  procedure ActiveChange(); virtual;

ActiveChange - if the data link is active, transmit the changed data to the sender

  procedure Notification(); override;

  procedure UpdateData(); virtual;

UpdateData - if data changed, copy new text via the datalink

  procedure FocusRequest(); virtual;

FocusRequest - a request has been received, so focus is given

  procedure Loaded; override;

  procedure Change; override;

Change - software emulation of the OnChange event

  procedure KeyPress(); override;

KeyPress - simulates the action of pressing the specified key

  procedure WndProc(); override;

WndProc - message handler for the procedure of this window

protected

  class procedure WSRegisterClass; override;

public

  constructor Create(); override;

Create - constructor for TDBMemo: calls inherited Create, then sets style and forms datalinks and actions

  destructor Destroy; override;

Destroy - destructor for TDBMemo: frees datalinks then calls inherited Destroy

  procedure EditingDone; override;

EditingDone - if link allows modifications and is in an Editing state, updates data via the link then calls inherited EditingDone

  procedure LoadMemo; virtual;

LoadMemo - tries to load data from current field as a string if possible, otherwise returns an exception

  property Field: TField; [r]

The field in the DataSet to which this control is to be linked. Can be referred to by name, or as an index

published

  property Align;

Used to align the control to the top, bottom, left or right of its client.

  property Anchors;

The set of anchor definitions for this control

  property AutoDisplay: Boolean; [rw]

AutoDisplay - if True, automatically displays the data when loaded

  property BorderSpacing;

Determines the border spacing for this control

  property BorderStyle;

  property CharCase;

  property Color;

Determine the colour for the current control

  property DataField: String; [rw]

The name of the field, as a string (ie cannot be referred to as an Index)

  property DataSource: TDataSource; [rw]

The DataSource from which information is obtained to display in this control. Usually the result of a database query

  property DragCursor;

DragCursor - the style of cursor to be used during the Drag process

  property DragMode;

DragMode - whether manual or automatic

  property Font;

The font to be used for text in this control (read/write).

  property MaxLength;

MaxLength: maximum length allowed for text string

  property OnChange;

OnChange - event handler for any change in text

  property OnDragDrop;

Event handler for the drop of a control onto this control.

  property OnDragOver;

Event handler for the case when a control is dragged over another control

  property OnEditingDone;

  property OnEndDrag;

Event handler for the end of a dragging process

  property OnEnter;

OnEnter - event handler for when the mouse enters the control, and the control receives focus

  property OnExit;

OnExit - event handler for when the mouse leaves the control and it loses focus

  property OnKeyDown;

OnKeyDown - event handler for instance when key is down while control has focus

  property OnKeyPress;

OnKeyPress - event controller for a key being pressed while the control has focus. To properly handle national chars use UTF8KeyPress instead.

  property OnKeyUp;

OnKeyUp - event handler for instance when a key is up (not pressed) while the control has focus

  property OnStartDrag;

Event handler for start of dragging operation

  property OnUTF8KeyPress;

UTF8KeyPress - event controller for a key being pressed while the control has focus.

  property ParentFont;

ParentFont - should the control use the same font as the parent? Default is true

  property PopupMenu;

PopupMenu - a context-sensitive menu that pops up when the right mouse button is clicked over this control

  property ReadOnly: Boolean; [rw]

ReadOnly - the contents of the edit box may only be read, not written or erased

  property ScrollBars;

Whether the Memo has ScrollBars - none, horizontal or vertical or both, or automatically placed if needed

  property TabOrder;

The place this control occupies in the list of tabs

  property Tabstop;

Is the control in the sequence of controls accessed by successive presses of the Tab key?

  property Visible;

Visible - can the control be seen?

  property WordWrap;

Is WordWrap enabled, allowing long words to be carried on to the next line?

end;

TDBMemo

TDBMemo - a data-aware Memo box to process the multi-line text of a single field in a dataset

TCustomMemo

TCustomMemo : the base class for TMemo

TCustomEdit

TCustomEdit : the base type from which the TEdit Box is derived.

TWinControl

TControl

TLCLComponent

TLCLComponent - base class for LCL components

TComponent,IUnknown,IInterfaceComponentReference

TPersistent

TObject

HowToUseDataAwareControls

HowToUseDataAwareControls - Hints for accessing databases