TPenHandleCache

pt 

RemoveItem

Create

CompareDescriptors

FindPen

FindPenDesc

Add

TResourceCache

pt 

RemoveItem

pt 

RemoveDescriptor

pt 

ItemUsed

pt 

ItemUnused

pt 

ItemIsUsed

Create

Clear

Destroy

CompareItems

CompareDescriptors

ConsistencyCheck

Lock

Unlock