I am running the NI-IMAQ\Sample\MSVC\Grab examples but a "no interface found" error message appears although I have connected my webcam.

[lookykooky]

Hi Charlton,

Big thanks for the code but I am using LabVIEW 7.1.

Hope u can repost to suit my version.

Thank you again! 

[lookykooky]

Hi Charlton,

Big thanks for the code!

But i'm using LabVIEW 7.1..

Hope u can repost the code that suits my version

Thank you again!

[yaHeard]

looky,

This version should suit you better.

[lookykooky]

Thanks.

I've got the sample program 

[lookykooky]

Hi Charlton,

I still could not find the solution for write output file function.

I have some questions here (please refer to the pic)

For No.1 - How can i just use this T/F flag to be connected to the color output loop? i've tried but they can't be wired together.

For No.2 - Alternatively, can i use this match score and set it to be the condition for the loop? (e.g. when the score is larger than 750, red will be printed out as the output. But these two are from different kind of data type.

That's all.

Thank you in advance.

[yaHeard]

Hi,

The comparison VIs and values are pretty irrelevant to the program.  I only added them to make the example useable and to demonstrate how to use the true/false values from 4 different boolean controls to write one string to the file.  I'll answer No. 2 first, though.  You are right in saying that you can use the score to print out the specific color value, but the output is a 1-D array, so you will just have to index the array to get the specific score to compare.  This is the same reason you cannot connect the T/F flag to the loop.  The output is a 1-D array and the loop input is looking for a single value, so indexing this output array will give you the single value.  Hope this clears some things up!