IS_SPECIAL_DATAOBJECT macro (mmc.h)

The IS_SPECIAL_DATAOBJECT macro determines whether an LPDATAOBJECT passed by MMC in a call to the snap-in's Notify method is a special type of data object instead of a pointer to an actual IDataObject object.

Syntax

void IS_SPECIAL_DATAOBJECT(
   d
);

Parameters

d

A value of type LPDATAOBJECT to be evaluated.

Return value

None

Remarks

MMC can pass DOBJ_CUSTOMOCX or DOBJ_CUSTOMWEB as the data object in the following methods with the following notifications:

• IExtendControlbar::ControlbarNotify

  MMCN_BTN_CLICK

• IComponent::Notify

  MMCN_BTN_CLICK with param set to MMC_VERB_PROPERTIES

  MMCN_DELETE

  MMCN_PASTE

  MMCN_PRINT

  MMCN_REFRESH

If you have custom views (webpage, custom OCX, or taskpad), you can use this macro to verify that the notifications listed above pass a pointer to a data object or one of the special values, and then handle them appropriately.

Requirements

Requirement	Value
Minimum supported client	Windows Vista
Minimum supported server	Windows Server 2008
Target Platform	Windows
Header	mmc.h