Hi Maheshkumar,
To use the signal probe and the average message block you need to add a Function Probe block and a WX GUI Text Box block. For the Probe Signal block give it an ID. In Function Probe block - Assign it an ID, block ID should be ID of Probe Signal block, and function name should be "level" (no quotes). In the WX GUI Text Box the default value should be the ID of the Function Probe block. You should be able to run it now and it'll display values in the text box. Should be the same procedure for Average Message block.