Deallocating memory of a Bitmap created with a pointer to image bits

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As described in the article KB814675
http://support.microsoft.com/?scid=kb%3Ben-us%3B814675&x=9&y=17

"When a Bitmap object is created with a pointer to image bits, the new
object may or may not use the memory at that address as backing for
the image. Therefore, the application must make sure that the memory
can be used during the life of the Bitmap object"

That's ok but ..
As I know there is no way to know when the Bitmap object will be
disposed.
so when should the supplied memory deallocated ?

Any Idea ?

.

Relevant Pages

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