Purpose
Read a zip file

GuiXT has no built-in support for zip files, so you need to call a JavaScript , VBScript or VB.NET function. Here we show the JavaScript solution.
Solution

// unzip the file into a temporary folder
CallJS
tempfolder = "unzip" "C:\guixt\sample.zip" "&%[TEMP]"

// display test message with content of target directory
CopyText fromDirectory="&V[tempfolder]" toText="msg"
Message "&text[msg]"

JavaScript function
function unzip(zipfile, parentfolder)
{

    // create shell opbject
    var sh = guixt.CreateObject("Shell.Application");

    var zip = sh.NameSpace(zipfile);

    if (!zip) {
        alert("File " + zipfile + " not found");
        return "";
    };

    // files contained in zip file
    var src = zip.Items();

    // parent folder
    var par = sh.NameSpace(parentfolder);

    // create temp folder 
    var tempfolder = "temp." + Math.random();
    par.NewFolder(tempfolder);
    var trg = sh.NameSpace(parentfolder + "\\" + tempfolder);

    // copy files 
    trg.CopyHere(src);

    // wait since shell copy is done asynchronously
    while (src.count != trg.Items().count) {
        guixt.DoEvents()
    };

    // free objects
    trg = null;
    src = null;
    sh = null;

    return parentfolder + "\\" + tempfolder;
};

Components
InputAssistant