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Win32::DDE::Client - Perl extension for Win32 DDE client |
NAME
Win32::DDE::Client - Perl extension for Win32 DDE client
SUPPORTED PLATFORMS
- Windows
SYNOPSIS
use Win32::DDE::Client;
$Client = new Win32::DDE::Client ('Server', 'Topic');
die "Unable to initiate conversation" if $Client->Error;
defined ($hesays = $Client->Request ('ITEM1')) ||
die "DDE request failed";
$Client->Poke ('ITEM2', 'VALUE2') ||
die "DDE poke failed";
$Client->Execute ('COMMAND') ||
die "DDE execute failed";
$Client->Disconnect;
DESCRIPTION
Win32::DDE::Client is a class implementing a simple DDE client in Perl.
CONSTRUCTOR
- new (SERVER, TOPIC)
-
This is the constructor for a new Win32::DDE::Client object.
SERVERandTOPICare the server and topic names for the server to connect to. A server object will be returned, regardless of the success or failure of the connect; you will have to use the Error method to figure out if the connect succeeded or not.
METHODS
Unless otherwise stated all methods return either a true or false value, with true meaning that the operation was a success. When a method states that it returns a value, failure will be returned as undef.
Request(ITEM)
- Returns the value of ITEM from the DDE server.
- Poke (ITEM, VALUE)
- Pokes VALUE into ITEM at the DDE server.
- Execute (CMD)
- Executes CMD at the DDE server.
- Disconnect
- Disconnects from the DDE server. This will get done when the object is DESTROYed, but you can make it happen sooner by invoking it explicitly.
- Error
-
Returns the error code from the last DDE operation that took place (the connect
that took place in the constructor, a Request, Poke, or Execute). Error codes
can be checked using the Win32::DDE::DMLERR* functions (DMLERR_NO_ERROR,
DMLERR_NO_CONV_ESTABLISHED, and DMLERR_NOTPROCESSED are particularly popular).
See the ErrorText function in the Win32::DDE manpage for a way to make these useful.
- ErrorMessage
-
Returns a somewhat cryptic error message from the last DDE operation that took
place (the connect that took place in the constructor, a Request, Poke, or
Execute).
This method will give a little more detail than a Win32::DDE::ErrorMessage($Client->Error).
- Timeout ([NEWVALUE])
-
If NEWVALUE is present, set the timeout value (in milliseconds) used for
DDE operations; return the old value.
The timeout value is initially set to $Win32::DDE::Client::Timeout when the object is constructed. $Win32::DDE::Client::Timeout is set to 1000 when the module is loaded.
AUTHORS
Doug Breshears Gurusamy Sarathy, gsar@umich.edu current maintainer, Doug Wegscheid, wegscd@whirlpool.com
SEE ALSO
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Win32::DDE::Client - Perl extension for Win32 DDE client |