%DDEREQ Request data from application.
% DDEREQ requests data from a server application via an established DDE
% conversation. DDEREQ returns a matrix containing the requested data
% or an empty matrix if the function is unsuccessful.
%
% data = DDEREQ(channel,item,format,timeout)
%
% data Matrix containing requested data, empty if function fails.
% channel Conversation channel from DDEINIT.
% item String specifying the server application's DDE item name
% for the data requested.
% format (optional) Two-element array specifying the format of the
% data requested.
% The first element indicates a Windows clipboard
% format to use for the data transfer.
% Use '1' for CF_TEXT transfer or the value returned from
% CLIPFORM to select binary transfer.
% The default format is CF_TEXT.
% The second element of the format array specifies the type of
% the resultant matrix. The valid types are NUMERIC (the default,
% corresponding to a value of 0) and STRING (corresponding to a
% value of 1).
% timeout (optional) Scalar specifying the time-out limit for this
% operation. Timeout is specified in milliseconds.
% (1000 milliseconds = 1 second).
% The default timeout is three seconds.
%
% For example,
% Request a matrix of cells from Excel
% mymtx = ddereq(channel, 'r1c1:r10c10');
%
% See also DDEINIT, DDETERM, DDEEXEC, DDEPOKE, DDEADV, DDEUNADV, CLIPFORM.
% Copyright (c) 1997 TU Chemnitz-Zwickau
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