LstNewList

[Chris Yourch]

Hi,

I am just getting started with the palm OS and am having some trouble
dynamically creating a list control that is connected to a popup trigger.

I used constructor to add a popup trigger to a form and I then dynamically
create a list that I connect to the popup trigger. I am getting the error
message "... just read directly from an unallocated chunk of memory". See
below for the code I am using.

Thanks,
Chris

-------------------------------------------------------

FormPtr m_pForm;
VoidHand m_hStrings;
Word eCredentialID = 101;

void CContactForm::OnOpenForm()
{
     ListPtr trigger =
(ListPtr)GetObjectPtr(ContactIdentificationCredentialPopTrigger);

     Word visibleItems = 3;
     Err ret = LstNewList(&m_pForm, eCredentialID,
                         trigger->bounds.topLeft.x,
trigger->bounds.topLeft.y,
                         trigger->bounds.extent.x,
trigger->bounds.extent.y,
                         stdFont, visibleItems,
ContactIdentificationCredentialPopTrigger);
     ListPtr list = (ListPtr)GetObjectPtr(eCredentialID);
     CtlSetUsable((ControlPtr)list, false);

     CharPtr pStrings = "PA\0MD\0RNP\0ME\0RN\0";
     Word nStrCnt = 5;
     m_hStrings = SysFormPointerArrayToStrings(pStrings, nStrCnt);
     char **p = (char **)MemHandleLock(m_hStrings);
     LstSetListChoices(list, p, nStrCnt);
}

void CContactForm::OnCloseForm()
{
     ListPtr list = (ListPtr)GetObjectPtr(eCredentialID);
     LstSetListChoices(list, NULL, 0);
     MemHandleUnlock(m_hStrings);
     MemHandleFree(m_hStrings);
     m_hStrings = NULL;
}