Please post code, not pictures of code. It helps speed up responses as people can just copy/paste instead of trying to read a screenshot. Please see Wiki - how to post code on this forum.
The code you posted is only opening a popup window. You would need to open that window in the designer to see what is configured on it. The popup window appears to be generic as the code is passing the alarm number to the window when opening it.
Inspect that window in the designer to see if there are any scripts or additional bindings on the window that fetch the PNG that you see.
Also, check the image management tool in the designer to see if the pictures are stored there.