Du musst rtpsStyleArray als Array ;D übergeben und zwar pro Spalte ein Element. In der Designerhilfe gibts dazu folgendes Beispiel:
This view action creates a basic table of 4 rows and 3 columns, and populates it. The width of each column is fixed at 1.5 inches. The left margin of the table is 1.5 inches.
Sub Click(Source As Button)
Dim session As New NotesSession
Dim db As NotesDatabase
Set db = session.CurrentDatabase
REM Create document with Body rich text item
Dim doc As New NotesDocument(db)
Call doc.ReplaceItemValue("Form", "Main topic")
Call doc.ReplaceItemValue("Subject", "Table 4 x 3")
Dim body As New NotesRichTextItem(doc, "Body")
REM Create table in Body item
rowCount% = 4
columnCount% = 3
Dim styles(1 To 3) As NotesRichTextParagraphStyle
For i% = 1 To 3 Step 1
Set styles(i%) = session.CreateRichTextParagraphStyle
styles(i%).LeftMargin = 0
styles(i%).FirstLineLeftMargin = 0
styles(i%).RightMargin = RULER_ONE_INCH * 1.5
Next
Call body.AppendTable _
(rowCount%, columnCount%,, RULER_ONE_INCH * 1.5, styles)
REM Populate table
Dim rtnav As NotesRichTextNavigator
Set rtnav = body.CreateNavigator
Call rtnav.FindFirstElement(RTELEM_TYPE_TABLECELL)
For iRow% = 1 To 4 Step 1
For iColumn% = 1 To 3 Step 1
Call body.BeginInsert(rtnav)
Call body.AppendText("Row " & iRow% & ", Column " & iColumn%)
Call body.EndInsert
Call rtnav.FindNextElement(RTELEM_TYPE_TABLECELL)
Next
Next
REM Save document and refresh view
Call doc.Save(True, False)
Dim ws As New NotesUIWorkspace
Call ws.ViewRefresh
End Sub