Question about using property node in IMAQ application

[Dejun]

I am learning how to use my PCI-1411 card and IMAQ VIs. By checking examples coming with IMAQ drivers, I found almost every example code uses a property node before IMAQ Create VI.  I don't know what's the advantage of using this property node. For my understanding, it is redundent for passing data.

So, anyone can explain it for me? Thanks a lot.

Regards,

Derek 

[BruceAmmons]

What property node are they using?  It is probably the one that indicates the image type that the camera will acquire.  This is done so that the image type created matches what the camera will return.  This makes the examples more compatible with different acquisition cards.

In your programs, you will probably know what your camera will be returning, so you can just use a constant to set the image type.

Bruce

[Dejun]

I see, thanks a lot.

So I will use constant for image type, no worry about the property node.