yOffset

Set the vertical offset from the lower-left corner of the paper.
[read/write property] yOffset([out, retval] double *offset) yOffset([in] double offset)
This property sets the vertical offset from the lower-left corner of the paper. The distance is in points.

Similarly, the xOffset property sets the horizontal offset.

resetParams resets these to their default values, which are zero offset.

VB6:
pdf.xOffset = 18 pdf.yOffset = 18
xOffset
resetParams