Hi Shital,
> ctlP = FrmGetObjectPtr (frmPtr, FrmGetObjectIndex
> (frmPtr,PushButtonHour));
> timeP = MemPtrNew(4);
> timeP = CtlGetLabel(ctlP);
timeP is a pointer to the resource now, the MemPtrNew has
no effect (besides being a memory leak).
> CtlSetLabel(ctlP,timeP);
> MemPtrFree(timeP);
Hence you are trying to free the memory belonging to
the control here. Besides, the pointer passed to
CtlSetLabel must survive the function, as this function
does not make a copy of data (Palm OS 3.0 Manual, Vol. I,
Page 228).
I normally handle these things as follows:
CharPtr timeP = NULL; // global variable!
void function() {
if( !timeP ) {
timeP = MemPtrNew(...);
...initalize timeP
}
...no calls to CtlGetLabel neccessary
...compute new contents in place
CtlSetLabel( ctl, timeP );
// this also notifies the GUI about a value change
}
Hope this helps,
Holger Klawitter
--
Holger Klawitter +49 (0)251 484 0637
[EMAIL PROTECTED] http://www.klawitter.de/
