diff --git a/Cargo.lock b/Cargo.lock
index e7ee688..a9a6880 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -14,6 +14,12 @@ version = "2.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8f68f53c83ab957f72c32642f3868eec03eb974d1fb82e453128456482613d36"
 
+[[package]]
+name = "byteorder"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
+
 [[package]]
 name = "cc"
 version = "1.2.15"
@@ -235,6 +241,15 @@ version = "0.3.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "953ec861398dccce10c670dfeaf3ec4911ca479e9c02154b3a215178c5f566f2"
 
+[[package]]
+name = "ppv-lite86"
+version = "0.2.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77957b295656769bb8ad2b6a6b09d897d94f05c41b069aede1fcdaa675eaea04"
+dependencies = [
+ "zerocopy 0.7.35",
+]
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.93"
@@ -253,6 +268,37 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "rand"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3779b94aeb87e8bd4e834cee3650289ee9e0d5677f976ecdb6d219e5f4f6cd94"
+dependencies = [
+ "rand_chacha",
+ "rand_core",
+ "zerocopy 0.8.20",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3022b5f1df60f26e1ffddd6c66e8aa15de382ae63b3a0c1bfc0e4d3e3f325cb"
+dependencies = [
+ "ppv-lite86",
+ "rand_core",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a509b1a2ffbe92afab0e55c8fd99dea1c280e8171bd2d88682bb20bc41cbc2c"
+dependencies = [
+ "getrandom",
+ "zerocopy 0.8.20",
+]
+
 [[package]]
 name = "rustix"
 version = "0.38.44"
@@ -331,6 +377,7 @@ version = "0.1.0"
 dependencies = [
  "cxx",
  "cxx-build",
+ "rand",
  "system-deps",
  "tempfile",
 ]
@@ -548,3 +595,44 @@ checksum = "3268f3d866458b787f390cf61f4bbb563b922d091359f9608842999eaee3943c"
 dependencies = [
  "bitflags",
 ]
+
+[[package]]
+name = "zerocopy"
+version = "0.7.35"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b9b4fd18abc82b8136838da5d50bae7bdea537c574d8dc1a34ed098d6c166f0"
+dependencies = [
+ "byteorder",
+ "zerocopy-derive 0.7.35",
+]
+
+[[package]]
+name = "zerocopy"
+version = "0.8.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dde3bb8c68a8f3f1ed4ac9221aad6b10cece3e60a8e2ea54a6a2dec806d0084c"
+dependencies = [
+ "zerocopy-derive 0.8.20",
+]
+
+[[package]]
+name = "zerocopy-derive"
+version = "0.7.35"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fa4f8080344d4671fb4e831a13ad1e68092748387dfc4f55e356242fae12ce3e"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "zerocopy-derive"
+version = "0.8.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eea57037071898bf96a6da35fd626f4f27e9cee3ead2a6c703cf09d472b2e700"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
diff --git a/Cargo.toml b/Cargo.toml
index aac59a9..af1f22c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,6 +5,7 @@ edition = "2021"
 
 [dependencies]
 cxx = "1.0.141"
+rand = "0.9.0"
 
 [build-dependencies]
 cxx-build = "1.0.141"
diff --git a/src/cxx/mod.rs b/src/cxx/mod.rs
index 26e18da..b80c16a 100644
--- a/src/cxx/mod.rs
+++ b/src/cxx/mod.rs
@@ -5,14 +5,16 @@ pub mod ffi {
         include!("sword_rs/src/cxx/module.h");
 
         type Mgr;
-        type Module;
 
         fn new_mgr() -> UniquePtr<Mgr>;
         fn new_mgr_with_path(path: &String) -> UniquePtr<Mgr>;
         fn get_modules(self: &Mgr) -> Vec<String>;
         fn get_module(self: Pin<&mut Mgr>, name: &String) -> UniquePtr<Module>;
 
+        type Module;
+
         fn get_name(self: &Module) -> String;
+        fn set_key_text(self: Pin<&mut Module>, key_text: &String) -> ();
         fn strip_text(self: Pin<&mut Module>) -> String;
     }
 }
diff --git a/src/cxx/module.h b/src/cxx/module.h
index 9a852d4..9dea142 100644
--- a/src/cxx/module.h
+++ b/src/cxx/module.h
@@ -20,4 +20,8 @@ class Module {
                 (const char*) this->module->stripText()
             );
         }
+
+        void set_key_text(const rust::String& keyText) {
+            this->module->setKeyText(std::string(keyText).c_str());
+        }
 };
diff --git a/src/main.rs b/src/main.rs
index e02de51..525b883 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,4 @@
+use rand::Rng;
 use sword_rs::mgr::Mgr;
 
 fn main() {
@@ -5,6 +6,13 @@ fn main() {
     for mod_name in mgr.get_modules() {
         let mut module = mgr.get_module(&mod_name);
         println!("Module: {}", module.get_name());
-        println!("Text: {}", module.strip_text());
+        let random_number: i32 = rand::rng().gen_range(1..=20);
+        let random_number_str = format!("John.3.{}", random_number);
+        module.set_key_text(&random_number_str);
+        println!(
+            "Text John 3:{} is \"{}\"",
+            random_number,
+            module.strip_text()
+        );
     }
 }
diff --git a/src/module.rs b/src/module.rs
index 1f46705..70aef8a 100644
--- a/src/module.rs
+++ b/src/module.rs
@@ -17,4 +17,8 @@ impl Module {
     pub fn strip_text(&mut self) -> String {
         self.module.pin_mut().strip_text()
     }
+
+    pub fn set_key_text(&mut self, key_text: &String) {
+        self.module.pin_mut().set_key_text(key_text);
+    }
 }