.. highlightlang:: us

.. index:: DdeCallback_Poke

.. _ddecallback_poke:

DdeCallback_Poke
================

.. us.tag  DdeCallback_Poke ENGLISH

:ref:`DdeCallback_Poke` is called by the client to send data to UniPlot.

.. function::  bool = DdeCallback_Poke(hConv, ssItem, ssTopic, ssData)

.. us.return

**Return Value**

*bool* is TRUE (1) if the function call was successful,
otherwise FALSE (0).

.. us.params

**Parameters**

.. uparam:: hConv

   *hConv* is the channel number.

.. uparam:: ssItem

   *ssItem* is the item name.

.. uparam:: ssTopic

   *ssTopic* is the topic name.

.. uparam:: ssData

   *ssData* is the data send to UniPlot.

.. us.example

**Example**

The following Word-Basic program sends data to UniScript using the
function :ref:`DdeCallback_Poke`:

::

   Sub Main
       chan = DDEInitiate("UniPlotSL", "xydata")
       DDEPoke(chan, "xydata", "1,5,3,4,8,12")
       DDETerminate(chan)
   End Sub

The Word-Basic command ``DDEPoke(chan, "xydata", "1,5,3,4,8,12")``,
should create a diagram with a x/y dataset in UniPlot. To do so, we have
to make the following changes to the :ref:`DdeCallback_Poke` function in
the :file:`UniPlot/script/obj_dde.ic` file:

::

   def DdeCallback_Poke(hConv, ssItem, ssTopic, ssData)
   {
       printf("---Poke---\n";
       printf("Conversation-No.: %x, Item: %s, Topic: %s, Data: %s\n\n", ..
           hConv, ssItem, ssTopic, ssData);
       ss = strtok(ssData, ",")
       rvData = strtod(ss)
       plot(1:len(rvData), rvData);
       return TRUE;
   }

.. seealso::
   :ref:`overview-dde`,
   :ref:`DdeCallback_Connect`,
   :ref:`DdeCallback_ConnectConfirm`,
   :ref:`DdeCallback_Disconnect`,
   :ref:`DdeCallback_Request`,
   :ref:`DdeCallback_Execute`

:sub:`id-105871`