> What I want to do is retreive the text in a list.
>
>
> void MyFunction()
> {
> Word HitButton;
> Word indx;
> ListPtr list;
> FormPtr frm;
> char* tmp ;
>
> frm = FrmGetActiveForm();
>
> list =
> (ListPtr)FrmGetObjectPtr(frm,FrmGetObjectIndex(frm,ViewLogsDBListList));
> indx = LstGetSelection (list);
> tmp = LstGetSelectionText (list, indx); // return pointer to text
in
> list
> HitButton = FrmCustomAlert(LogDeleteAlert, tmp, NULL , NULL);
> }
>
> I get a "app read from low memory" error when it gets to the
> "LstGetSelectionText" line. "List" is a valid ListPtr and "indx" = the
> index of the item in the list.
1) Make sure you're not getting a "-1 == noListSelection" from
LstGetSelection, which would happen if nothing is selected in the list.
2) LstGetSelectionText only works if you've got real text entries in the
list. If you're using a custom draw function, then there is no backing list
of strings from which to grab.
> Another questions is why in all the examples I never see FrmGetObjectPtr,
or
> other functions that return void pointers, needing to be typecasted to the
> type of the pointer that is being set? But if I do that I get a "cannot
> convert void* to [insert type here]*" error when I compile?
If you're in C++, you'll get this message. In C, "void *" silently converts
to any other pointer type, so you get no warning.
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