void test(string strWksName)
{
	// Start with an active worksheet that has the data and error bars
	Worksheet wks = strWksName;
	if( !wks )
	{
		out_str( "Invalid worksheet object!" );
		return;
	}
	
	// Create a curve from columns of the worksheet
	// Refer to columns by position number
	Curve crvData(wks, 0, 1);
	
	// Create a new graph
	// Can replace default template with custom one if needed
	GraphPage gpg;
	gpg.Create( "Origin.OTP" );
	// Point to Layer 1 and plot the curve
	// Can change to point to different layer as needed
	GraphLayer gly = gpg.Layers( 0 );
	gly.AddPlot( crvData, IDM_PLOT_SCATTER );
	
	// Define error dataset and add to data plot
	Dataset dsErr( wks, 2);
	int	nPlotIndex = gly.AddErrBar( crvData, dsErr );
	if( -1 == nPlotIndex)
	{
		out_str( "Failed to add error bar data" );
		return;
	}
	
	// Rescale layer - can leave out if not desired
	gly.Rescale();
	
	// Perform nonlinear fit to plotted data
	using NLSF = LabTalk.NLSF; 
	NLSF.Init();  
	NLSF.Func$ = "expdec1";
	NLSF.FitData$ = crvData.GetName();
	NLSF.Execute("parainit");  
	
	// Set NLSF weighting method to instrumental
	// Note that you also need to point to the error bar dataset
	NLSF.Wtype = 1;
	NLSF.W$ = dsErr.GetName();
	// Also clear the "Scale parameter errors with reduced chi-sq"
	// When using error bars, the default mode is to have this property cleared
	NLSF.ChiSqrErr = 0;
	
	NLSF.Fit(100); 
	NLSF.PasteParams("P"); 
	NLSF.End();  

}