On Tue, 11 Apr 2000, Nicholas Breau wrote:
> I've got a popup trigger whose listbox is loaded with data from the database
> by using LstSetDrawFunction. When I run the app, the data is loaded into
> the popup fine, but when I select an item, I get the error message:
>
> "AppName" has just read directly from low memory.
>
> and the device needs to be reset. Does anybody have any idea as to what
> would cause this error ?
Just a guess. You probably use something like:
LstSetListChoices(listP, NULL, size), like what is shown in Palm
Programming, then use the callback function to draw to the screen.
Remember that your ListCallbackDrawFunction does not actually do
anything to the list. It just uses the parameters to draw to the screen
in the appropriate location.
So, if you do something like LstGetSelectionText() you are getting a
NULL pointer returned, because you did not actually provide anything
that points to any test for this function to return.
What you might need to do is get the selected list index of the selected
item and get the data from the original source.
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