daqStart(h,numchannels,vrange)

function daqStart(h,numchannels,vrange)
% function daqStart(h,numchannels,vrange)
% Define the number of channels and desired voltage range for A-D
% conversion using National Instruments hardware.
% h is the TaskHandle returned by daqInit.
% The device being used is 'Dev1' and the hardware channels start with
% channel 0 and run to channel number (numchannels-1).
% The AD converter is set to accept voltages from -vrange to vrange, 
% in volts.

if nargin<2
    numchannels=1;
end;
if nargin<3
    vrange=1;
end;

DAQ(int32(2),uint32(h),uint32(numchannels),double(vrange));