详细描述
Macro Definition Documentation
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VC_SAFETY
Set this flag to use the
Safety
class during changes to ensure the object does not become corrupt during low memory conditions.
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VC_DONTCOPYDATA
Speed-up flag.
PointObject::ResizeObject()
usually copies all old data into a new bigger memory block. This flag suppresses the copying to save memory bandwidth.
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警告
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If this flag is set a function must handle all tags on their own. Only set it if you know what you are doing.
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VC_DONTCLEARDATA
This flag prevents
PointObject::ResizeObject()
to clear the memory during its data initialization.