How to change CString to a 64 bit integer

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How can I change a CString to 64 bit integer?  
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CString str("2342353465664");

Error free code.
CString str("2342546546754756786678");
__int64 data = _atoi64((LPCTSTR)str);

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thaneshAuthor Commented:
Hi Rajeev,

Thanks. Why would the first one be error prone?
Two reasons

1. GetBuffer(int nMinBufLength );  takes one parameter.

2. You need to store the converted value somewhere :)
__int64 data =
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