How do I define a data type as an "IMG_ERR"?

[timmkish]

For instance

imaq1394ConfigureAcquisitionCW (sessionId As SESSION_ID, continuous As Long, bufferCount As Long) As IMG_ERR

[chris.b]

Dim errorVariable As IMG_ERR

Have you added imaq1394.dll as a reference

Message Edited by CXB on 10-29-2008 02:00 PM

[timmkish]

yes, i have added it as a reference

when i type the following

Public Declare Function imaq1394ConfigureAcquisitionCW Lib "imaq1394.dll" (ByVal sessionId As Integer, ByVal continuous As Integer, ByVal bufferCount As Integer) As IMG_ERR

the DE tells me that

'type IMG_ERR is not defined' 

[timmkish]

Also, is

'-2067990495' a valid session ID number?

[chris.b]

Hi Timmkish,

Can you run the "Low Level Grab1394.vbp" example (probably in C:\Documents and Settings\All Users\Documents\National Instruments\NI-IMAQ for IEEE-1394\Examples\VB\Low Level Grab1394)? This example References "NI-IMAQ for IEEE 1394" (imaq1394.dll) and sets a variable to IMG_ERR. It also uses imaq1394ConfigureAcquisitionCW.

Just a snippet...

Dim sid As SESSION_ID
Dim errorCode As IMG_ERR
Dim myImage As New CWIMAQImage
Dim BufferNumber As Long

Private Sub GrabButton_Click()
    CWIMAQViewer1.Attach myImage
   
    errorCode = imaq1394CameraOpen2(CameraName.Text, IMG1394_CAMERA_MODE_CONTROLLER, sid)
    If (errorCode <> IMG1394_ERR_GOOD) Then
        GoTo Error
    End If
   
    '  Configure a continuous acquisition (continuous = 1)
    '  using 3 hardware buffers (bufferCount = 3).
    errorCode = imaq1394ConfigureAcquisitionCW(sid, 1, 3)
    If (errorCode <> IMG1394_ERR_GOOD) Then
        GoTo Error
    End If

Message Edited by CXB on 11-04-2008 02:57 PM

[chris.b]

'-2067990495' should be a valid session ID.  Mine were '-2081623455' and '-2083720607'.