Develop a desktop application using Python and Tkinter that prompts the user to enter a number and determines if it's even or odd.

Use import tkinter as tk The application should have a window titled "Module Lab $4".$

The window size should be fixed at $300$x$150$ pixels.

Include a label, a textbox, and a button within the window.

When a user enters a number and clicks the "Check" button, the application should Implement error handling for invalid inputs $($non$-$numeric values$).$