Create structure of handles
handles = guihandles(object_handle)
handles = guihandles
handles = guihandles(object_handle) returns a structure containing the handles of the objects in a figure, using the value of their Tagproperties as the field names, with the following caveats:
Objects are excluded if their Tag properties are empty, or are not legal variable names.
If several objects have the same Tag, that field in the structure contains a vector of handles.
Objects with hidden handles are included in the structure.