daqmx dig write.frm

Digital Output in NI-DAQmx using Visual Basic 6.0

VERSION 5.00
Begin VB.Form Form1 
   BorderStyle     =   3  'Fixed Dialog
   Caption         =   "DAQmx Write to Digital Lines"
   ClientHeight    =   2685
   ClientLeft      =   45
   ClientTop       =   435
   ClientWidth     =   4365
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   2685
   ScaleWidth      =   4365
   ShowInTaskbar   =   0   'False
   StartUpPosition =   3  'Windows Default
   Begin VB.TextBox txtChannelString 
      Height          =   375
      Left            =   1080
      TabIndex        =   1
      Text            =   "Dev1/port0/line0:7"
      Top             =   720
      Width           =   2535
   End
   Begin VB.CommandButton Command1 
      Caption         =   "Write to digital lines"
      Height          =   615
      Left            =   1080
      TabIndex        =   0
      Top             =   1440
      Width           =   2055
   End
   Begin VB.Label Label1 
      Caption         =   "Channel String:"
      Height          =   495
      Left            =   360
      TabIndex        =   2
      Top             =   720
      Width           =   615
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit


Private Sub Command1_Click()
    
    Dim sampsPerChanWritten As Long
    Dim taskHandle As Long
    
    ' Write zeros or ones to the digital lines
    Dim i As Integer
    Dim writeArray(0 To 7) As Byte
    For i = 0 To 7
        writeArray(i) = 1
    Next
    
    ' Create the DAQmx task.
    DAQmxErrChk DAQmxCreateTask("", taskHandle)
    
    ' Add a digital output channel to the task.
    DAQmxErrChk DAQmxCreateDOChan(taskHandle, txtChannelString.Text, "", DAQmx_Val_ChanForAllLines)
    
    ' Start the task running, and write to the digital lines.
    DAQmxErrChk DAQmxStartTask(taskHandle)
    DAQmxErrChk DAQmxWriteDigitalLines(taskHandle, 1, 1, 10#, DAQmx_Val_GroupByChannel, writeArray(0), sampsPerChanWritten, 0)
    
    MsgBox "Samples per channel written = " & sampsPerChanWritten
    
    ' All done!
    DAQmxErrChk DAQmxStopTask(taskHandle)
    DAQmxErrChk DAQmxClearTask(taskHandle)

End Sub