NEW YORK (CNN/Money) - Dell Inc. boosted its second-quarter profit forecast by two cents a share Friday, citing robust sales in the quarter and the positive impact of declines in its global tax rate.

Dell (DELL: Research, Estimates) said it now expects to earn 31 cents a share for the quarter, up from its earlier guidance of 29 cents a share. Revenue is expected to come in at about $11.7 billion.

Separately, Dell is expected to announce Kevin Rollins as its new CEO at the company's annual shareholders meeting.

Industry analysts expect the company's global market share in the second quarter increased to more than 18 percent, up a full point from the same period a year ago.

Dell shares rose 33 cents to $35.20 in before-hours trading Friday on Instinet.