View source for HM INVALIDATE DDF DATA

{{DISPLAYTITLE:HM_INVALIDATE_DDF_DATA}}
The application sends this message to IPF to indicate that the previous DDF
data is no longer valid.

==Syntax==
<pre>
param1
ULONG rescount; /* The count of DDFs to be invalidated. */

param2
PUSHORT resarray; /* Pointer to an array. */
</pre>

==Parameters==
;rescount ([[ULONG]]) - input: The count of DDFs to be invalidated.
;resarray (P[[USHORT]]) - input: Pointer to an array.
::The pointer to an array of unsigned 16-bit ([[USHORT]]) integers that are the '''res'''
:::numbers of DDFs to be invalidated.
:::'''Note''': If both param1 and param2 are NULL, then all the DDFs in that
::::page will be invalidated.

==Returns==
;rc ([[ULONG]]) - return: Return code.
::0: The procedure was successfully completed.
::Other: See the values of the '''errorcode''' parameter of the HM_ERROR message.

==Remarks==
When IPF receives this message, it discards the current DDF data and sends a
new [[HM_QUERY_DDF_DATA]] message to the object communication window.
This message should be sent to the child of the coverpage window handle.

==Default Processing==
None.

[[Category:Messages]]