>>>>>>Hi to all,
>>>>>>maybe there is no answer to my question but I try ...
>>>>>>
>>>>>>I want to trap (by an event or other) when the Enabled or Visible property/status change.
>>>>>>Think to write a control in a VCX and you want to know when the application code change you Enabled status, (without modify the application code, like calling a Enable() method)
>>>>>>
>>>>>>Thanks in advance, any suggestion will be appreciate,
>>>>>
>>>>>
>>>>>There is a programmatic change event that can be fired. I'm
>>>>>actually not that familiar with it. But hopefully that is the
>>>>>kind of thing your looking for.
>>>>>
>>>>>Dan
>>>>
>>>>Programmatic change watches the value in a control. It is fired when the value is changed from code, and interactive change is fired when the user changes the value. It cannot be used to watch the values of other properties
>>>
>>>
>>>Alright, thanks for the info. If that is true though and if I'm
>>>reading the question correctly and he is programatically changing
>>>the Enabled or Visible status, all he would have to do in
>>>addition to changing these properties would be to change a value
>>>in a control. This would in turn trigger the programatic change.
>>>I know . . . a lot of extra work when this can be handled much
>>>better with a timed event. Just curious if this could work.
>>>
>>>Dan
>>
>>I think it could work, but it misses the point. Probably the reason that he wants a virtual 'event' for the changing of these values is so that code can be fired automatically when the value of the properties change. There could be several different places in form, formset, toolbar or anywhere that toggle the enabled property for a given control, and the only way to make sure that your code gets fired when _anyone_ toggles the value is to make a 'virtual' event from a timer.

If I understand Erik's reasoning. He using a timer not to change
anything but, he's just using it to check values at certain intervals.
The point here is that there is no effective method to always be
able to check to see if a value has changed. So just have the
timer fire and a given interval and check that value.



>
>If there are numerous instances in which (based on varying criteria)
>the enabled/visible properties can be changed, would it not make sense
>to have a single custom method that any controls that affect the
>setting can call? In this way, any code relative to a change in the
>setting can be dealt with when the change occurs instead of having
>to contend with a timer that is constantly firing in order to
>determine if something 'should be' done.
>
>For example, if the values of three out of ten textboxes on an
>interface are used to determine whether a command button should
>be enabled/visible, could the three textboxes not call a method
>'SetEnabled()' that would perform some type of evaluation and
>set the property/properties accordingly?
>
>Dan