Spread 8 and vb Net

is it possible to use "GetCellBorder" with Visual Basic .net ?

I have alway an error
Dim I as integer
Dim Style As Object = Nothing
Dim Color As Object

For i = 1 To FP.MaxRows
FP.GetCellBorder(1, i, 16, Color, Style)

' if etc…

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See attachements please

Thank You

Stephane