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 # SurfacePolylineExportSpectrum 

 Last update: 17.07.2025 

## Description

Exports the spectrum data of a measurement polyline to a spectrum file. Returns TRUE if the call has succeeded, FALSE otherwise.

## Syntax

- `object.SurfacePolylineExportSpectrum(VARIANT* vPtX, VARIANT* vPtY, BSTR bstrFileName)` as Boolean
- *object*: Virtual Human Vision Lab
- *vPtX*: array of VARIANT for the horizontal coordinate of each vertex of the polyline
- *vPtY*: array of VARIANT for the vertical coordinate of each vertex of the polyline
- *bstrFileName*: path and filename of the spectrum (.spectrum, .spe) file

## VB script example

```VB
Creates VisionLabViewer COM server
set VisionLabViewer = CreateObject("VisionLabViewer.application")
' Opens XMP file
VisionLabViewer.OpenFile("C:\Example.xmp")
' Exports spectrum into SPE file
vPtx = array(-0.3, 0.3, 0.3, -0.3)
vPty = array(-0.3, -0.3, 0.3, 0.3)
VisionLabViewer.SurfacePolylineExportSpectrum(vPtx, vPty, "C:\Example.spe")

```