diff --git a/components/hello-world/package.json b/components/hello-world/package.json
index 4512cae..87c2535 100644
--- a/components/hello-world/package.json
+++ b/components/hello-world/package.json
@@ -19,6 +19,7 @@
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "dependencies": {
+    "c-preprocessor": "^0.2.13",
     "chalk": "^2.4.1",
     "commander": "^2.19.0",
     "readdirp": "^3.0.0"
diff --git a/components/hello-world/src/Main.ts b/components/hello-world/src/Main.ts
new file mode 100644
index 0000000..18f8e80
--- /dev/null
+++ b/components/hello-world/src/Main.ts
@@ -0,0 +1,15 @@
+import * as fs from "fs";
+import * as path from "path";
+import * as chalk from "chalk";
+
+export function Main (subStr: string) {
+// command: c-preprocessor Main.ts MainoutputFile.ts
+#include "config1.js"
+#if "VARIENT" == "MAC"
+console.log("Mac platform string value: " + subStr);
+#elif "VARIENT" == "LINUX"
+console.log("Linux platform string value: " + subStr);
+#else
+console.log("Windows platform string value: " + subStr);
+#endif
+}
\ No newline at end of file
diff --git a/components/hello-world/src/additional.ts b/components/hello-world/src/additional.ts
deleted file mode 100644
index e69de29..0000000
diff --git a/components/hello-world/src/config1.js b/components/hello-world/src/config1.js
new file mode 100644
index 0000000..0e680c7
--- /dev/null
+++ b/components/hello-world/src/config1.js
@@ -0,0 +1,6 @@
+#define MY_CONST true
+#define variable1 1
+#define variable2 4
+//#define MY_CONST2 House
+#define MY_CONST3 42
+#define VARIENT LINUX
\ No newline at end of file
diff --git a/components/hello-world/src/index.js b/components/hello-world/src/index.js
index a2880bd..d9a8a73 100644
--- a/components/hello-world/src/index.js
+++ b/components/hello-world/src/index.js
@@ -3,6 +3,7 @@ const path = require("path");
 const chalk=require("chalk");
 const rimraf = require("rimraf");
 const commander = require("commander");
+const main = require("./Main").Main;
 
 const program = new commander.Command("Hello World NPM CLI");
 program.option("--displayMsg");
@@ -17,4 +18,28 @@ if (program.green) {
 
 if (program.red) {
     console.log(chalk.red("Message was configured to show in red color."));
-}
\ No newline at end of file
+}
+
+// ** c-preprocess **
+// 1st globally install this package
+//command: c-preprocessor index.js outputFile.js
+//-------------------------------------------------
+// #include "config1.js"
+
+// #if variable1 + variable2 == 5 && defined(MY_CONST)
+// console("Multi-condition test")
+// #elif "MY_CONST2" == "House"
+// console.log("Equality Check Pass")
+// #else
+// console.log("Default Statement!")
+// #endif
+
+// #ifndef MY_CONST3
+// console.log("Var is not defined!")
+// #else
+// console.log("Var is defined!")
+// #endif
+//-------------------------------------------------
+
+var str = "Hello World";
+main(str);