I put it like this, but did not work, could you please help me:
function pushbutton76_Callback(hObject, eventdata, handles)
% Note, if you're saving an image you can use imsave() instead of uiputfile().
startingFolder = userpath
defaultFileName = fullfile(startingFolder, 'scsh.jpg')
[baseFileName, folder] = uiputfile(defaultFileName, 'Specify a file');
if baseFileName == 0
% User clicked the Cancel button.