Select shape from multiple closed borders in Image to obtain cell information/index from cell array B

    rgbFrame = readFrame(VideoObject) ;	% Read video frame in RGB
    gFrame = rgb2gray(rgbFrame) ;       % Convert frame to Grayscale
    bwFrame = imbinarize(gFrame, 'adaptive' ) ;      % Convert gFrame to bwFrame
    bwFrame = bwareaopen( bwFrame , 100 ) ;  % Remove noise from bwFrame
    bwFrame = imfill(bwFrame, 'holes') ; % Fill holes 
    [B,L] = bwboundaries(bwFrame,'noholes') ; % Obtain shape boundaries

Using the code above, I obtain a cell array of B with the borders of several closed shapes in my video frame. I would like to display all of the shapes on an image, select with the cursor (Maybe "ButtonDownFcn"?) the intended shape, and create a new cell array called "Circle" with only the information from the intended shape.