>Nadya,
>
>One textbox will do
>
>It holds one integer
>
>Set
>- its value to 0
>- format to RL
>- Inputmask to 99:99
>
>- Valid event to
>

>if( (int(this.value/100) > 24) or ( mod(this.Value,100) > 59) )
>	wait window nowait '00:00 - 23:59'
>	return 0
>endif
>

>
>Easily 'upgraded' to hh:mm:ss ( 99:99:99 )

I quickly tried this solution, but it's a bit inconvenient for the input if, for example, I want to enter 1:10 (one hour 10 minutes) I asked for re-newing a subscription...