As a senior engineer, let's deep dive into the practical application of WebAssembly through creating a simple wasm module using C++. Using our C++ skills, we focus on compiling a very simple 'Hello, World!' program into a wasm module.

Step 1: Let's start by writing our 'Hello, World!' program in C++. This program will simply print 'Hello, World!' to the console.

Step 2: Next, you need to compile the C++ code into wasm using Emscripten. Install the Emscripten SDK if you haven't already using the package manager of your choice.

Step 3: Open the terminal, navigate to the directory of the code, and run the Emscripten command to compile the C++ code to wasm.

Step 4: If successful, the compilation will create a wasm file. This is your wasm module.

Tip: It's important to note that this simple example is just scratching the surface. Being able to compile complex C++ programs into wasm modules will unlock the true power of WebAssembly in delivering high-performance web-applications.

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#include <iostream>

using namespace std;

int main() {

  cout << "Hello, World!" << endl;

  return 0;

}