Declarationproperty ShareBitmaps: boolean;
If ShareBitmaps is true, ShareBitmaps activates 'equal images' sharing.
In this mode, each image inserted with ObjBitmap
is compared (pixel per pixel) with already inserted images.
If the new image is already present, it will be marked as a reference to the old image.
For these reasons each change made to a shared image will be made to all objects that use it.