DnDIsDataAvailable (Function)

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DnDIsDataAvailable (Function)

In french: DnDDonnéeDisponible

Checks whether a specific type of data is available during Drag/Drop.

Example

// Only the "CF_TEXT" copy is allowed
IF DnDIsDataAvailable(CF_TEXT) = True THEN
ResRetrieve = DnDGetData(CF_TEXT)
END

Syntax

<Result> = DnDIsDataAvailable(<Type of data>)

<Result>: Boolean

True if the specified type of data is available,
False otherwise.

<Type of data>: Integer or character string

Type of data copied/moved (corresponds to the type of data specified by DnDCacheData and DnDGetData).
Preset data types:
Only some types of data are presented below. For more details, see the Microsoft documentation ("Standard Clipboard Formats").
CF_TEXT 1 ANSI string ending with a \0 character
CF_BITMAP 2 .BMP (bitmap image)
CF_METAFILEPICT 3 .WMF (graphic primitive file)
CF_SYLK 4 .SLK, Excel, Multiplan
CF_DIF 5 Data interchange format (lotus)
CF_TIFF 6 .TIF (TIFF image)
CF_OEMTEXT 7 OEM string ending with a \0 character
CF_DIB 8 .DIB (bitmap independent from the device managers)
CF_PALETTE 9 Palette (Windows standard)
CF_PENDATA 10 Optical pen
CF_RIFF 11 Audio format
CF_WAVE 12 .WAV (sound data)
CF_UNICODETEXT 13 Text string with characters coded on 2 bytes (support for internationalization)
CF_ENHMETAFILE 14 .EMF (Windows 32-bit graphic primitives )
CF_HDROP 15 Format of "dropped" file (in Windows NT)
CF_LOCALE 16 Format local to Windows (in Windows NT)
Character string:
Type of data created beforehand.
For example:

Data1 is string = CUSTOMER.KEY + TAB + INVOICE.PRICE
DnDCacheData("MyType", Data1)

The "MyType" type will correspond to what was assigned to the "Data" string.

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: wd270obj.dll