To convert PDF Documents to Word format.

wordOutputOptions := NewWordOutputOptions()

// Optionally convert only the first page
wordOutputOptions.SetPages(1, 1)

// Requires the Structured Output module
ConvertToWord(filename, output_filename, wordOutputOptions)

To convert PDF Documents to Excel format.

excelOutputOptions := NewExcelOutputOptions()

// Optionally convert only the first page
excelOutputOptions.SetPages(1, 1)

// Requires the Structured Output module
ConvertToExcel(filename, output_filename, excelOutputOptions)

To convert PDF Documents to PowerPoint format.

powerPointOutputOptions := NewPowerPointOutputOptions()

// Optionally convert only the first page
powerPointOutputOptions.SetPages(1, 1)

// Requires the Structured Output module
ConvertToPowerPoint(filename, output_filename, powerPointOutputOptions)

Convert PDF to Office
Full sample code which shows how to convert generic PDF documents to Word, Excel, PowerPoint format