Advantech PCI-1682U Manual de usuario descargar pdf (Pagina 70)

PCI-1680U/1682U User Manual 64

2. Design graphical interfaces. Add one Button and six Text controls to Form1.

4.7.2.3 Write code

1. Write corresponding code for Button1.

Private Sub Button1_Click()

Dim hDevice As Long

Dim Status As CanStatusPar_t

Dim result As Boolean

Dim dwOutLen As Long

Dim ov As OVERLAPPED

'Open Can Port "CAN1".

'You can also change "CAN1" to a port's name which you

have installed.

hDevice = CreateFile("\\.\can1", GENERIC_READ +

GENERIC_WRITE, 0&, 0&, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL

+ FILE_FLAG_OVERLAPPED, 0&) 'Open the CAN port in synchronous

mode

If hDevice = &HFFFFFFFF Then

MsgBox ("Open Error!")

Exit Sub

End If

'Get Can port status.

result = DeviceIoControl(hDevice, CAN_IOCTL_STATUS, Noth-

ing, 0&, Status, Len(Status), dwOutLen, 0&)

If Not result Then

MsgBox ("GetStauts Error!")

Exit Sub

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Advantech PCI-1682U Manual de usuario Pagina 70