Layout Plot offset Origin to 0,0

[Bert Ken]

In Autocad 2006, there's a new variable named "Plotoffset".

When I put its value at 1 and change the plot offset in pagesetup dialog box, my the 0,0 is all the way at the bottom left of the sheet. But in Vba, when I put 0,0 , the value change
to an other value. So I can't match my form with the sheet border. Is there a way to put the good coordinates in the "PLOT ORIGIN" property in VBA to adjust my sheet at the right place?