using System;
using System.Text;
using System.Text.RegularExpressions;
using System.Collections.Generic;

IField Section0 = Document.Sections[0];
if (Section0 == null)
{
    FCTools.ShowMessage("Section0 is null");
}

IField foundTable = Section0.Field("Keyword Search");
if (foundTable == null)
{
    FCTools.ShowMessage("\"Keyword Search\" field not found");
    return;
}

// Show or hide "Keyword Search" hits.
for (int targetIndex = 0; targetIndex < 100; targetIndex++)
{
    if ( !foundTable.HasField("Target" + targetIndex) ) break;
    IField fldTarget = foundTable.Field("Target" + targetIndex);
    
    fldTarget.IsVisible = !string.IsNullOrEmpty(fldTarget.Text);
}