| All | 0 | This is shorthand for "all events". It is not an event in its own right. See Special Case for All events . |
| ActivateApp | 139 | User has switched to/from the APL application |
| AddCol | 153 | appended a column to a Grid object |
| AddRow | 152 | appended a row to a Grid object |
| AmbientChanged | 533 | reported when any of the ambient properties change in an application hosting an ActiveXControl object |
| AnimStarted | 294 | reported just before an AVI clip starts playing in an Animation object. |
| AnimStopped | 295 | reported just after an AVI clip stops playing in an Animation object. |
| BadValue | 180 | attempted to leave Edit object with invalid text |
| BalloonHide | 862 | reported when a BalloonTip is displayed |
| BalloonShow | 861 | reported when a BalloonTip disappears |
| BalloonTimeout | 863 | reported when a BalloonTip is dismissed |
| BalloonUserClick | 864 | reported when a BalloonTip is clicked |
| BeginEditLabel | 300 | signals the start of an edit operation in a ListView or TreeView object |
| CalendarDblClick | 273 | reported when the user double-clicks the left mouse button over a Calendar object |
| CalendarDown | 271 | reported when the user depresses the left mouse button over a Calendar object |
| CalendarMove | 274 | reported when the user moves the left mouse button over a Calendar object |
| CalendarUp | 272 | reported when the user releases the left mouse button over a Calendar object |
| CellChanged | 164 | modified and updated the contents of a cell in a Grid object |
| CellChange | 150 | modified the contents of a cell in a Grid object |
| CellDblClick | 163 | double-clicked the mouse on a cell in a Grid |
| CellDown | 161 | depressed a mouse button over a cell in a Grid |
| CellError | 157 | input invalid data into a cell in a Grid |
| CellMove | 151 | moved to a new cell in a Grid object |
| CellOver | 160 | mouse moved over a cell in a Grid object |
| CellUp | 162 | released a mouse button over a cell in a Grid |
| Change | 36 | altered the text in an Edit or Combo |
| ClickComment | 225 | user has clicked the mouse in a comment window of a Grid |
| ClipChange | 120 | data in the clipboard has changed |
| Close | 33 | Form is about to be closed |
| CloseUp | 46 | reported by a DateTimePicker object just before the drop-down calendar is hidden |
| ColorChange | 430 | user has selected a colour in a ColorButton |
| ColumnClick | 320 | user has clicked on a heading in a ListView |
| Configure | 31 | position and/or size of an object is about to change |
| ContextMenu | 410 | user has performed a standard Windows action to display a ContextMenu |
| Create | 34 | reported after an object has been created |
| DateTimeChange | 267 | user has changed the DateTime value in a DateTimePicker object |
| DDE | 50 | DDE message has been received or sent |
| DisplayChange | 137 | user has changed screen resolution or number of colours |
| DockAccept | 483 | reported by a host object just before it accepts a client object docking operation |
| DockCancel | 485 | user has aborted a docking operation by pressing Escape |
| DockEnd | 484 | reported by a client object after it has been successfully docked in a host object |
| DockMove | 481 | reported by a host object when a dockable object (the client) is dragged over it |
| DockRequest | 482 | reported by a client object just before it is docked in a host object, when the user releases the mouse button |
| DockStart | 480 | reported by a client object when the user starts to drag it using the mouse |
| DoPopup | 846 | triggered when the HTMLRenderer client attempts to open a new window. |
| DragDrop | 11 | moved an object using drag & drop operation |
| DropDown | 45 | user has clicked the drop-down button in an object, just before the drop-down part is displayed |
| DropFiles | 450 | user has drag/dropped a file icon onto an object |
| DropObjects | 455 | user has drag/dropped an object icon from the Workspace Explorer or Find Objects tool onto an object |
| DyalogCustomMessage1 | 95 | allows external applications and dynamic link libraries to insert events into the Dyalog APL/W message queue |
| EndEditLabel | 301 | signals completion of an edit operation in a ListView or TreeView object |
| EndSplit | 282 | reported when user releases the left mouse button to signify the end of a drag operation on a Splitter object |
| ExitApp | 132 | selected End Task from the Windows Task List |
| ExitWindows | 131 | requested Windows to terminate |
| Expanding | 302 | reported by a TreeView object as it is about to expand |
| Expose | 32 | exposed part or all of a Form or a Static |
| FileBoxCancel | 72 | selected the Cancel button in a FileBox |
| FileBoxOK | 71 | selected the Ok button in a FileBox |
| FontCancel | 242 | user has pressed the Cancel button or closed the font selection dialog box |
| FontOK | 241 | user has pressed the OK button in the font selection dialog box |
| FrameContextMenu | 411 | user has clicked the right mouse button over the non-client area of an object |
| GesturePan | 494 | generated by a Pan gesture |
| GesturePressAndTap | 497 | generated by a press-and-tap gesture |
| GestureRotate | 495 | generated by a rotate gesture |
| GestureTwoFingerTap | 496 | generated by a two-finger-tap gesture |
| GestureZoom | 493 | generated by a zoom gesture |
| GetDayStates | 266 | reported when a Calendar object requires the Dyalog program to provide day state information for the range of dates it is about to display |
| GetTipText | 325 | reported by a TreeView or ListView object just before it displays a tip for a specific row |
| GotFocus | 40 | user has moved the keyboard focus to a new object |
| GridCopy | 191 | reported when the user presses Ctrl+Insert and there are selected cells in the Grid |
| GridCopyError | 196 | the user has pressed Ctrl+Insert and there is more than one block of selected cells in the Grid and the blocks are non-conformable |
| GridCut | 190 | the user has pressed Shift+Delete and there are selected cells in the Grid |
| GridDelete | 193 | the user has pressed Delete and there are selected cells in the Grid |
| GridDropSel | 195 | the user has drag/dropped a selected block of cells in the Grid |
| GridKeyPress | 24 | user has pressed a key in a Grid cell |
| GridPaste | 192 | the user has pressed Shift+Insert and there is data in the clipboard that is in a suitable format for the Grid |
| GridPasteError | 194 | the user has pressed Shift+Insert and there is data in the clipboard, but the system is unable to paste the data into the Grid |
| GridSelect | 165 | user has changed the selection in a Grid |
| Help | 400 | user has clicked the Question (?) button and then clicked on an object |
| HideComment | 224 | generated just before a comment window is hidden as a result of the user moving the mouse-pointer away from a commented cell |
| HScroll | 39 | requested movement in horizontal scrollbar of Form |
| HThumbDrag | 442 | user has dragged the thumb of the horizontal scrollbar of a Form or SubForm |
| HTTPRequest | | raised when an HTMLRenderer issues a request for a url on the internal server |
| Idle | 130 | generated when system is idle |
| IndexChanged | 210 | user has scrolled the data in a Grid so that the value of its Index property has changed |
| ItemDblClick | 342 | user has double-clicked on an item in a ListView or TreeView object |
| ItemDown | 340 | user has depressed the left mouse button over an item in a ListView or TreeView object |
| ItemUp | 341 | user has released the left mouse button over an item in a ListView or TreeView object |
| KeyError | 23 | pressed an invalid key on the keyboard |
| KeyPress | 22 | pressed a key on the keyboard |
| Locator | 80 | terminated interaction with a Locator object |
| LostFocus | 41 | object has lost the input focus |
| MDIActivate | 42 | MDI SubForm becomes the active one |
| MDIDeactivate | 43 | MDI SubForm is deactivated |
| MouseDblClick | 5 | double-clicked a mouse button |
| MouseDown | 1 | pressed mouse button down |
| MouseEnter | 6 | moved the mouse into the object |
| MouseLeave | 7 | moved the mouse out of the object |
| MouseMove | 3 | user has moved the mouse |
| MouseUp | 2 | user released a mouse button |
| MouseWheel | 8 | user rotated the mouse wheel |
| MsgBtn1 | 61 | user selected first button in a MsgBox |
| MsgBtn2 | 62 | user selected second button in a MsgBox |
| MsgBtn3 | 63 | user selected third button in a MsgBox |
| PageActivate | 360 | user has switched to a new PropertyPage |
| PageApply | 350 | user has clicked Apply in a PropertySheet |
| PageBack | 353 | user has clicked Back in a PropertySheet |
| PageCancel | 351 | user has clicked Cancel in a PropertySheet |
| PageChanged | 356 | user has altered Changed property of a PropertyPage |
| PageDeactivate | 361 | user has switched to a new PropertyPage |
| PageFinish | 355 | user has clicked Finish in a PropertySheet |
| PageHelp | 352 | user has clicked Help in a PropertySheet |
| PageNext | 354 | user has clicked Next in a PropertySheet |
| PreCreate | 534 | Reported when an instance of an ActiveXControl is created |
| Protected | 470 | user has attempted to alter protected text in a RichEdit object |
| Retracting | 304 | reported by a TreeView object as it is about to retract |
| Scroll | 37 | requested a movement of the thumb in scrollbar |
| SelDateChange | 265 | reported when the user changes the date that is selected in a Calendar object |
| Select | 30 | user has selected the object |
| SelectCertificate | 848 | triggered when an HTMLRenderer requests a resource that requires a certificate |
| ServiceNotification | 94 | reported when Windows requests a change in the state of an APL service |
| SetColSize | 176 | generated when column width changes in a Grid |
| SetItemPosition | 322 | generated when the user drag-drops an item in a ListView |
| SetRowSize | 175 | generated when row height changes in a Grid |
| SetSpinnerText | 421 | user has clicked a spin button in a Spinner object |
| SetWizard | 365 | user has clicked Next or Back in a PropertySheet |
| ShowComment | 223 | generated when the user rests the mouse pointer over a commented cell |
| Spin | 420 | user has clicked a spin button in a Spinner object |
| Splitting | 281 | reported while a Splitter object is being dragged, between a StartSplit and an EndSplit |
| StartSplit | 280 | reported when the user depresses the left mouse button over a Splitter object |
| StateChange | 35 | Form is about to change state |
| SysColorChange | 134 | system colour scheme has changed |
| TCPAccept | 371 | reported when a client connects to a server TCPSocket object |
| TCPClose | 374 | reported when the remote end of a TCP/IP connection breaks the connection |
| TCPConnect | 372 | reported when a server accepts the connection of a client TCPSocket object and is reported by the client |
| TCPError | 370 | generated when a fatal TCP/IP error occurs and is reported by a TCPSocket object |
| TCPGotAddr | 377 | reported when a host name (specified by the RemoteAddrName or LocalAddrName property) is resolved to an IP address |
| TCPGotPort | 378 | reported when a port name (specified by the RemotePortName or LocalPortName property) is resolved to a port number |
| TCPReady | 379 | reported when the TCP/IP buffers are free and there is no data waiting to be sent in the internal APL queue |
| TCPRecv | 373 | reported when data is received by a TCPSocket object |
| ThumbDrag | 440 | user is dragging the thumb in a TrackBar |
| Timer | 140 | event generated by a Timer object |
| VScroll | 38 | requested movement in vertical scrollbar of Form |
| VThumbDrag | 441 | user has dragged the thumb of the vertical scrollbar of a Form or SubForm |
| WebSocketClose | 843 | triggered when the HTMLRenderer client closes a WebSocket |
| WebSocketError | 844 | triggered when an error occurs on a WebSocket |
| WebSocketReceive | 842 | triggered when data is received over a WebSocket |
| WebSocketUpgrade | 841 | reported when the client component of an HTMLRenderer object opens a WebSocket |
| WinIniChange | 133 | WIN.INI has changed |