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 # SurfacePolylineExportTXT 

 Last update: 17.07.2025 

## Description

Exports values of 2D polyline to a text file format. Returns TRUE if the call has succeeded, FALSE otherwise.

## Syntax

- `object.SurfacePolylineExportTXT(VARIANT* vPtX, VARIANT* vPtY, int iSampling, 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
- *iSampling*: number of measurements along the polyline
- *bstrFileName*: path and filename of the text (.txt) file.

## VB script example

```VB
' Creates VisionLabViewer COM server
set VisionLabViewer = CreateObject("VisionLabViewer.application")
' Opens XMP file
VisionLabViewer.OpenFile("C:\Example.xmp")
' Exports values into TXT file
vPtx = array(-4, -4, 4, 4)
vPty = array(-4, 4, -4, 4)
VisionLabViewer.SurfacePolylineExportTXT(vPtx, vPty, 50, "C:\Example.txt")

```