DnDEvent (Function)

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DnDEvent (Function)

In french: DnDEvénement

Indicates the procedure to run during an event of Drag/Drop.

Remark: To manage by programming the behavior of a control during a Drag and Drop operation, use ..DnDTarget and ..DndSource associated with the dndProgram constant.

Versions 17 and later

This function is now available in Browser code.

New in version 17

This function is now available in Browser code.

Example

See additional examples

// Call to the OnDrop procedure when the left mouse button
// is released on the target control named "EDT_Find"
DnDEvent("OnDrop", EDT_Find, dndDrop)

Syntax

DnDEvent(<Procedure> , <Control name> , <Type of event>)

<Procedure>: Character string

Name of the procedure that must be called during the <Type of Event> event on the <Control Name> control.

<Control name>: Character string (with or without quotes)

Name of the control on which the event must be processed.

<Type of event>: Constant

Type of event triggering the call to <Procedure>:
dndBeginDrag Beginning of a Drag/Drop in a source control.
dndDragEnter Entry in a target control.
dndEndDrag End of Drag/Drop.
dndDrop Release the left mouse button on a target control.
dndDragLeave Exit from a target control.
dndDragOver Hover a target control.

Remarks

Variables

The following variables can be used:

Variable name	Description

_DND.Action	Action specified in DnDAccept. The possible values are: dndCopy, dndMove and dndNone. This variable is not filled at the beginning of Drag and Drop in a source control (dndBeginDrag constant) or when exiting from a target control (dndDragLeave constant).
_DND.TargetControl	Name of the target control. This variable is not filled at the beginning of Drag and Drop in a source control (dndBeginDrag constant) or when exiting from a target control (dndDragLeave constant).
_DND.SourceControl	Name of Source Control.
_DND.CtrlDown	Status of Ctrl key: True: the Ctrl key is pressed. False: the Ctrl key is not pressed. This variable is not filled at the beginning of Drag and Drop in a source control (dndBeginDrag constant) or when exiting from a target control (dndDragLeave constant).
_DND.SourceWin	Name of source window. This variable is not filled when exiting from a target control (dndDragLeave constant).
_DND.MouseXPos	Horizontal position (X) of mouse cursor in relation to the control handled during the event. This variable is not filled when exiting from a target control (dndDragLeave constant).
_DND.MouseYPos	Vertical position (Y) of mouse cursor in relation to the control handled during the event. This variable is not filled when exiting from a target control (dndDragLeave constant).

The _DND.SourceControl and _DND.SourceWin variables return an empty string ("") when the Drag and Drop comes from an application other than the current application.

Component : wd250obj.dll