Problems in $worksheet->hideGridLines();

[Babe Ruth]

I want to hide the gridlines of my spreadsheet. I am using this syntax:

$worksheet->hideGridLines();

It is not working. The description given to this function in PEAR Documentation is:

"Set the option to hide gridlines on the printed page."

Does not the printed page means the whole worksheet? What should I do to hide the the entire gridlines of the worksheet?

[Babe Ruth]

Instead of

$worksheet->hideGridLines();

it should be

$worksheet->hideScreenGridlines();