bitmap will automatically be split into smaller images, each
matching the dimensions of the image list.
This does not apply when adding icons.
+
+ @onlyfor{wxmsw,wxmac}
*/
int Add(const wxIcon& icon);
@remarks The original bitmap or icon is not affected by the Replace()
operation, and can be deleted afterwards.
+
+ @onlyfor{wxmsw,wxmac}
*/
bool Replace(int index, const wxIcon& icon);
};