>>>>>>Do you use inputmask, e.g. "99:99" and format "R"?
>>>>>
>>>>>We have InputMask as below and no Format.
>>>>>

>>>>>!!:!! !!
>>>>>

>>>>
>>>>First of all, use "R" format. It will improve this thing, i.e. you will not get :: anymore. You could also make further improvements, e.g. by moving AM/PM part to separate box, or by resetting it in InteractiveChange event.
>>>
>>>What is your thought about using the InteractiveChange event to handle the AM/PM?
>>
>>You know, after thinking a bit, I would not even use InteractiveChange. You could instead use KeyPress event, something like this:
>>

>>LPARAMETERS nKeyCode, nShiftAltCtrl
>>IF this.SelStart=6
>>	IF INLIST(nKeyCode,65,80)
>>		RETURN
>>	endif
>>	nodefault
>>endif
>>

>>Also, use Inputmask '99:99 !M'.
>
>Ok, got that working, but still having trouble on entry of the time value. If we type "1:" it just doesn't take the ":" because the InputMask is numeric 9. I would like the cursor to jump to the character after the ":" in the entry. Any ideas?

I see Tore gave you right idea.
Frankly, if I could make this class, then I would use 2 spinners plus AM/PM combo.