How to save multi channel data in a same file?

hi... i'm a fresh guy of labVIEW programming... what i wish to know is how to save multi channel in a same file? i had try with the AI acquire waveform, but it still can't get what i need. Because AI acquire waveform need user key in those channel with ","... but ehat i want is user can choose the channel from a combo box and then once user click a 'add' button then the value will store in memory, after user click done then the value can send to AI acquire waveform together...
i had tried hard about this but still can't get what i want.... -_-|
hope anyone can reply as soon as possible...

HI, Brett B... thanks for your reply
I'm using labVIEW 7.1 Express... i know the "Write LabVIEW Measurement File.vi" too, but it cannot support the file tpe that i need... so i just can find other way to do that...
the file type that i need is call *.log\*.DAT... so... there got any solution to do that? or i can modified the "Write LabVIEW Measurement File.vi"?
Jaxx

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