VFP: Cancel validation on exit button click

Question:

In a Form, I have several textboxes that are validated against a table. The only logical way to set up the screen is for one of them to have the focus when you enter the form or after a save and ready for the next input (this textbox determines what all the rest have in them [e.g., the order number]). I also have a standard EXIT button which has Thisform.Release().

When I click the EXIT, the Valid() on the order field fires first and I must validate it before I can exit. My current work-around is to set the form's Key Preview on and check for ESCAPE and release.

How can I know in the Valid for order what event caused the valid to fire (i.e., the exit click) so I can conditionally skip the valid and let the form release?

I know I have seen this somewhere but can't remember.

Thanks,

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Answer:

There are a number of advantages of using an Exit button with the Cancel property set to .T. and checking for LastKey() = 27 in the Valid events of all of your control classes. One is that with Cancel set to .T. clicking the button is the same as pressing Escape so checking for 27 (Escape) as the LastKey() will tell you if the Exit button has been clicked. Secondly with Cancel set to .T. pressing Escape will click the button and fire its Click event thusly allowing you to give the user an expected functionality for the escape key.

In my control classes the beginning of the Valid event is;

IF LastKey() = 27
   Keyboard "{CTRL+A}"
   RETURN .T.
ENDIF

The keyboard of CTRL+A is to change the value of LastKey() from 27. This is because if the user clicks the exit button and then only uses the mouse, lastkey() will remain 27 until some other key is pressed. Doing the keyboard changes lastkey from 27 so the only way it can be 27 again is by pressing escape or clicking a button that has Cancel set to .T.


http://fox.wikis.com/wc.dll?Wiki~SkipValidOnExit