AdWords API Re: changing ONLY the maxCPC of a keyword

briguy wrote:
> I'm trying to use the API to just change the keyword bid.
> Unfortunately, I can only find documentation on the updateCriteria()
> function. This function resets the URL as well as the maxCPC. If I
> don't set the destinationUrl, the exisiting destinationURL gets taken
> out of Google. I don't want to reset the destinationUrl, only the
> maxCPC to change my bid. Is there any other function I can use to ONLY
> change the maxCPC of a keyword or am I stuck resetting the entire URL
> each time I change a bid?

Richard's method is the way we do things as well, but looking at the
documentation has me wondering: "destinationUrl: If set, updates the
destination URL. If a blank string is present, we unset the destination
URL (so this keyword will default to using the one associated with the
creative)."

I'm not good enough at reading WSDL files to understand if the
Criterion Service makes a distinction between a blank string from the
destination URL and a null or omitted value. The verbiage suggests
that if the value is unset (null, not blank), the destination URL will
be left alone. If that is true, you wouldn't require the
getAllCriteria() step; you could simply populate an array of Criterion
objects with the ID and Ad Group IDs, max CPC, and pass it to
updateCriteria() and get the desired result.

Can someone verify or refute this?

-- Rajiv