I am trying to make a program that will take data input through an SFML GUI and then print and format it into specific slots in an Excel document. Any good APIs for this? If not any suggestions would be great.
In that case .tab is a tab delimited format. .csv stands for "Comma Seperated Value" Excel will know how to read either one of those with zero trouble at all.
I'd recommend .csv because it's "cleaner" to work with. When you want data to go into a new column just enter a comma, when you want a new row enter a new line.