This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
Assuming that the output device uses it as a tab then at least 1 and up to the 'tab size' setting for the device. Typically this is between 1 and 8 but for most output devices that accept tabs it can be configured. The 'tab' adds spaces to take the output to the next tab boundary (multiple of the tab size).
I’ve looked at a lot of different solutions, and in my humble opinion Aspose is the way to go. Here’s the link: http://aspose.com