[VBA]Create custom paper for plot

[lubracali]

Hello

I wrote this code to create pdf from a design by specifying which area of the drawing must be printed.

The code works, but the file is always in the format "A4".

How can I define a custom format with vba, that is not present in the default format for the printer?

Each print has a size different from the others and I wish the paper was the same size and proportions of the printed design.

I hope I explained myself well because my English is bad.
If not I'll try to explain better

This is the code

Private Sub cmdPdf_Click()

Dim stampa As AcadPlot
Dim nBACKGROUNDPLOT As Long

nBACKGROUNDPLOT = ThisDrawing.GetVariable("BACKGROUNDPLOT")

nBACKGROUNDPLOT = ThisDrawing.GetVariable("BACKGROUNDPLOT")

Dim num_prova As Integer
Dim x_origine As Double
Dim y_origine As Double
Dim origine_testa_y As Double
Dim ptA(0 To 2) As Double
Dim ptB(0 To 2) As Double


Dim puntoA As Variant
Dim puntoB As Variant


num_prova = txtNumProva.Text

x_origine = 200 + (num_prova * 200)
y_origine = 200


origine_testa_y = y_origine + 62.5



ptA(0) = x_origine + 14.4325
ptA(1) = y_origine + 7.1914
ptB(0) = x_origine + 104.4325
ptB(1) = origine_testa_y + 51.7515


puntoA = ptA
puntoB = ptB



ThisDrawing.ActiveLayout.CenterPlot = True
ThisDrawing.ActiveLayout.StandardScale = acScaleToFit
ThisDrawing.ActiveLayout.GetWindowToPlot puntoA, puntoB


ThisDrawing.ActiveLayout.PlotType = acWindow



Set stampa = ThisDrawing.Plot
stampa.PlotToDevice ("Adobe PDF")

Call ThisDrawing.SetVariable("BACKGROUNDPLOT", nBACKGROUNDPLOT)


End Sub