ImageList_GetImageInfo - alter the bitmap(s) ?

Hello all,

Using XPsp3.

I was playing with the idea to dynamically alter the contents of an 
ImageList, and found the 
https://learn.microsoft.com/en-us/windows/win32/api/commctrl/nf-commctrl-imagelist_getimageinfo 
function, which says :

"The information in this structure can be used to *directly* manipulate the 
bitmaps for the image"

(bolding mine).

I've been trying to think of how that is possible - the bitmaps cannot be 
selected into a memoryDC - and to google information about how that would 
work, but came up empty.

Question:
Does anyone know what "directly manipulate the bitmaps" method MS is 
referring to in the above ?

Remark:
I already thought of and written another way to do what I want, but would 
like to know how the above works.  Who knows, their (MS) method might be 
simpler. :-)

Regards,
Rudy Wieser