Accept a specific type of file Matlab

I have a GUI using a Browe Button to search a file :

function Browse(app, event)  
    FileName,FilePath ]= uigetfile(); 
    ExPath = fullfile(FilePath, FileName);   
    app.FileTextArea.Value = ExPath;  
end

And i save the file Path in a Text Area. I have another button that start a matlab script with the file path as parameter and so i would like to accept only a certain type of file (.ctm which is my own type of file) if possible like this :

if file is .ctm
    do something
else   
    print('a .ctm file is needed')

Thanks for helping

Answer 1

[Adam]

doc uigetfile

gives examples of specifying filters for file type.

You can use a generic uigetfile and a check like that after if you prefer, but it seems to make more sense to just use the uigetfile filter, e.g.

[file, path] = uigetfile( '*.ctm', 'Some title or other' )

though there are fancier options too.