That's the sort of thing you'll learn if you work your way through a
basic Palm development book (Neil Rhodes's book, published by
O'Reilly, will cover what you need). You should also get familiar
with the "Memory Manager" (p 182) and "Data Manager" (p 191) of the
PalmOS Companion. The answer to the question you asked, btw, is to
call MemHandleLock on the handle that was returned by DmQueryRecord,
casting it to your own record structure definion.
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