How to pass values between callback functions for video reading and extraction matlab Gui ?

I am browsing video path using edit text with tag BrawsePath and want to extract frames of this video using ExtractVideo Button, but cant figure out way of doing this as I am new to Gui. here is the code I am working with: --------------------------------------------

function BrowseButton_Callback(hObject, eventdata, handles)

[filename pathname] = uigetfile({'*.mp4';'*.avi'},'File Selector');

video = [pathname filename];

if pathname ~= 0

    set(handles.BrowsePath, 'String', video);

end

fid = fopen(fullfile(pathname, filename),'r');

RawData = textscan(fid, '%s', 'delimiter', '/n');

OfficeVideo = VideoReader(video);

hObject.OfficeVideo=OfficeVideo;

handles.fid=fid;

handles.video=video;

handles.RawData=RawData;

guidata(hObject, handles);

% --- Executes on button press in ExtractButton.

function ExtractButton_Callback(hObject, eventdata, handles)

opfolder = fullfile('C:','Users','Jay','Desktop','ExtractedFrames','Nature90');

%make directory and execute as indicated in op folder variable%

h = findobj('Tag','BrowseButton');

OfficeVid=h.OfficeVideo;

%OfficeVideo = VideoReader(vidfile);%

%read frame and store in output folder%

for ii = 1:OfficeVid.NumberOfFrames

    img = read(OfficeVid,ii);

    opBaseFileName = sprintf('%d.bmp',ii);

    opFullFileName = fullfile(opfolder,opBaseFileName);

    imwrite (img,opFullFileName,'bmp');

end

[Stephen23]

Question: "How to pass data between callbacks?"

Answer: exactly like the documentation explains:

https://www.mathworks.com/help/matlab/creating_guis/share-data-among-callbacks.html

The wiki also explains this:

http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.28s.29.3F

And some of the many threads on this forum that answer your question:

http://www.mathworks.com/matlabcentral/answers/146215-pass-data-between-gui-s

http://www.mathworks.com/matlabcentral/answers/179265-how-to-pass-a-struct-between-callbacks-in-gui