可參考下free Sprie.Doc for .net的設置方法:
'實例化壹個Document對象,並添加section
Dim doc As New Document()
Dim sec As Section = doc.AddSection()
'添加段落1,設置文字字間距效果
Dim p1 As Paragraph = sec.AddParagraph()
Dim tr1 As TextRange = p1.AppendText("設置文字字間距")
tr1.CharacterFormat.CharacterSpacing = 10
'保存文檔
doc.SaveToFile("文字效果.docx")
System.Diagnostics.Process.Start("文字效果.docx")
字間距設置效果: