exce reding with DDT

It would be helpful to see the Excel file you're using.

Also, your for loop in ProcessData doesn't have any braces around the code to be executed.  The way it looks now, it will only get the first column and that's all.

Finally, your increment of the record number needs to be inside the while loop, not the for loop, so it actually tracks the number of records.

I've attached my Excel file and here's the slightly modified code

var RecNo;
// Posts data to the log (helper routine)

function ProcessData(){
    var i;
    for(i = 0; i < DDT.CurrentDriver.ColumnCount; i++){
        Log.Message(DDT.CurrentDriver.ColumnName(i) + ": " + aqConvert.VarToStr(DDT.CurrentDriver.Value(i)));
        Log.PopLogFolder();
    }
}

// Creates the driver (main routine)
function TestDriver(){
    var Driver;
    Driver = DDT.ExcelDriver("C:\\Temp\\Test.xls", "Test", true);
    // Iterates through records
    RecNo = 0;
    while (!Driver.EOF()){
        ProcessData(); // Processes data
        Driver.Next(); // Goes to the next record
        RecNo = RecNo + 1;
    }
    // Closes the driver
    DDT.CloseDriver(Driver.Name);
}

Here's what the log looks like

So, as you can see, on principle, your code works.  But it needed a bit of refinement to actually do what you wanted it to do.