How to lock to a textbox to accept only numbers?

Two possibilities:

yourTextBox.Inutmask = '9'
yourTextBox.Format = '999999'

See VFP Help for detail and other options for the properties Inputmask and Format.

Try .wcHTML5inputType=‘number’

It didn't work, are there any examples in the live tutorial?

It didn't work

What did you do and obtain? Can you post some illustration?

are there any examples in the live tutorial?

Not for now

It worked correctly, I was using a customization from my web designer before, so it didn't work this for. Thank you.

Hi All,

But it seems that .inputMask = "AA999" does not lock text and number

For now, .inputMask support is limited to what the stock HTML attributes (eg. <input type="number">) and CSS properties (eg. text-transform:uppercase;) can do.

Additional support (eg. mixed letters and figures .inputMask = "AA999") would require an additional JavaScript library such as this one.

Thank you Thierry, I was afraid of missing something.
I will continue with an alert in .LostFocus