diff --git a/source/src/dt_app.hpp b/source/src/dt_app.hpp
index 94e4009..cd508d0 100644
--- a/source/src/dt_app.hpp
+++ b/source/src/dt_app.hpp
@@ -29,7 +29,8 @@ namespace dvsku_toolkit {
         dt_gui_mngr    m_gui;
 
         friend dt_comp_root;
-        //friend amo_sys_core;
+        friend dt_comp_pack;
+        friend dt_comp_unpack;
 
     private:
         bool prepare() override final;
diff --git a/source/src/gui/dt_comp_pack.cpp b/source/src/gui/dt_comp_pack.cpp
index 3b4cddb..da06425 100644
--- a/source/src/gui/dt_comp_pack.cpp
+++ b/source/src/gui/dt_comp_pack.cpp
@@ -1,15 +1,51 @@
 #include "gui/dt_comp_pack.hpp"
 #include "dt_app.hpp"
 
+#include <dv_gui_opengl/utilities/dv_util_dialog.hpp>
+
 using namespace dvsku_toolkit;
 
 ///////////////////////////////////////////////////////////////////////////////
 // PUBLIC
 
 dt_comp_pack::dt_comp_pack(dt_app& app)
-    : dt_gui_base(app) {}
+    : dt_gui_base(app)
+{
+    m_context.start_callback  = [this]() {
+        std::lock_guard<std::mutex> guard(m_mutex);
+
+        m_progress                          = 0.0f;
+        m_app.get_systems().core.is_working = true;
+
+        m_app.set_taskbar_status(dvsku::dv_taskbar_status::normal);
+        m_app.set_taskbar_progress(0U);
+    };
+    m_context.finish_callback = [this](libevp::evp_result result) {
+        std::lock_guard<std::mutex> guard(m_mutex);
+
+        m_progress                          = 100.0f;
+        m_app.get_systems().core.is_working = false;
+
+        m_app.set_taskbar_status(dvsku::dv_taskbar_status::no_progress);
+        m_app.set_taskbar_progress(0U);
+
+        if (result.status == libevp::evp_result_status::ok)
+            m_app.play_sound(dvsku::dv_sound_type::success);
+        else if (result.status == libevp::evp_result_status::error)
+            m_app.play_sound(dvsku::dv_sound_type::warning);
+    };
+    m_context.update_callback = [this](float progress) {
+        std::lock_guard<std::mutex> guard(m_mutex);
+
+        m_progress += progress;
+        m_app.set_taskbar_progress((uint64_t)m_progress);
+    };
+    m_context.cancel = &m_cancel;
+}
 
 void dt_comp_pack::render() {
+    std::lock_guard<std::mutex> guard(m_mutex);
+
     ImGui::PushID("Pack");
     ImGui::Indent(20.0f);
 
@@ -24,7 +60,10 @@ void dt_comp_pack::render() {
 
     ImGui::SameLine(0.0f, 5.0f);
     if (ImGui::Button("Select##Input", { 125.0f, 21.0f })) {
-        //file_dialog::select_folder(m_input);
+        auto result = dvsku::dv_util_dialog::select_dir("Input dir", m_input);
+
+        if (!result.empty())
+            m_input = result;
     }
 
     ImGui::Indent(3.0f);
@@ -36,7 +75,10 @@ void dt_comp_pack::render() {
 
     ImGui::SameLine(0.0f, 5.0f);
     if (ImGui::Button("Select##Output", { 125.0f, 21.0f })) {
-        //file_dialog::save_file(m_output);
+        auto result = dvsku::dv_util_dialog::save_file("Output evp", m_output, true, { "EVP (*.evp)", "*.evp" });
+
+        if (!result.empty())
+            m_output = result;
     }
 
     ImGui::Dummy({ 0.0f, 3.0f });
@@ -91,21 +133,14 @@ void dt_comp_pack::render() {
     auto avail = ImGui::GetContentRegionMax();
     ImGui::SetCursorPosX((avail.x) / 2 - (125 / 2.0f));
 
-    bool cannot_start = m_input.empty() || m_output.empty() || !m_cancel;
+    bool cannot_start = m_input.empty() || m_output.empty() || m_cancel;
 
     if (cannot_start)
         ImGui::BeginDisabled();
 
     if (!is_working) {
         if (ImGui::Button("Pack##Pack", { 125.0f, 21.0f })) {
-           /* m_components.systems.evp.set_start_callback([&]() { handle_on_start(); });
-            m_components.systems.evp.set_finish_callback([&](bool success) { handle_on_finish(success); });
-            m_components.systems.evp.set_update_callback([&](float value) { handle_on_update(value); });
-            m_components.systems.evp.set_error_callback([&](const std::string& msg) { handle_on_error(msg); });
-
-            m_components.systems.evp.set_cancel_token(&m_cancel);
-
-            m_components.systems.evp.pack(m_input, m_output, m_filter, m_encrypt, m_key, m_iv);*/
+            m_app.get_systems().evp.pack(m_input, m_output, m_filter, &m_context);
         }
     }
     else {
diff --git a/source/src/gui/dt_comp_pack.hpp b/source/src/gui/dt_comp_pack.hpp
index 88c307f..4eb066a 100644
--- a/source/src/gui/dt_comp_pack.hpp
+++ b/source/src/gui/dt_comp_pack.hpp
@@ -3,6 +3,8 @@
 #include "gui/dt_gui_base.hpp"
 
 #include <string>
+#include <mutex>
+#include <libevp.hpp>
 
 namespace dvsku_toolkit {
     class dt_comp_pack : public dt_gui_base {
@@ -25,5 +27,8 @@ namespace dvsku_toolkit {
         int         m_filter   = 0U;
         float       m_progress = 0.0f;
         bool        m_cancel   = false;
+
+        std::mutex          m_mutex;
+        libevp::evp_context m_context;
     };
 }
\ No newline at end of file
diff --git a/source/src/gui/dt_comp_unpack.cpp b/source/src/gui/dt_comp_unpack.cpp
index ec2af9f..d39fe25 100644
--- a/source/src/gui/dt_comp_unpack.cpp
+++ b/source/src/gui/dt_comp_unpack.cpp
@@ -1,15 +1,51 @@
 #include "gui/dt_comp_unpack.hpp"
 #include "dt_app.hpp"
 
+#include <dv_gui_opengl/utilities/dv_util_dialog.hpp>
+
 using namespace dvsku_toolkit;
 
 ///////////////////////////////////////////////////////////////////////////////
 // PUBLIC
 
 dt_comp_unpack::dt_comp_unpack(dt_app& app)
-    : dt_gui_base(app) {}
+    : dt_gui_base(app)
+{
+    m_context.start_callback = [this]() {
+        std::lock_guard<std::mutex> guard(m_mutex);
+
+        m_progress                          = 0.0f;
+        m_app.get_systems().core.is_working = true;
+        
+        m_app.set_taskbar_status(dvsku::dv_taskbar_status::normal);
+        m_app.set_taskbar_progress(0U);
+    };
+    m_context.finish_callback = [this](libevp::evp_result result) {
+        std::lock_guard<std::mutex> guard(m_mutex);
+
+        m_progress                          = 100.0f;
+        m_app.get_systems().core.is_working = false;
+
+        m_app.set_taskbar_status(dvsku::dv_taskbar_status::no_progress);
+        m_app.set_taskbar_progress(0U);
+
+        if (result.status == libevp::evp_result_status::ok)
+            m_app.play_sound(dvsku::dv_sound_type::success);
+        else if (result.status == libevp::evp_result_status::error)
+            m_app.play_sound(dvsku::dv_sound_type::warning);
+    };
+    m_context.update_callback = [this](float progress) {
+        std::lock_guard<std::mutex> guard(m_mutex);
+
+        m_progress += progress;
+        m_app.set_taskbar_progress((uint64_t)m_progress);
+    };
+    m_context.cancel = &m_cancel;
+}
 
 void dt_comp_unpack::render() {
+    std::lock_guard<std::mutex> guard(m_mutex);
+
     ImGui::PushID("Unpack");
     ImGui::Indent(20.0f);
 
@@ -24,7 +60,10 @@ void dt_comp_unpack::render() {
 
     ImGui::SameLine(0.0f, 5.0f);
     if (ImGui::Button("Select##Input", { 125.0f, 21.0f })) {
-        //file_dialog::open_file(m_input);
+        auto result = dvsku::dv_util_dialog::open_file("Input evp", m_input, { "EVP (*.evp)", "*.evp" });
+
+        if (!result.empty())
+            m_input = result[0];
     }
 
     ImGui::Indent(3.0f);
@@ -36,7 +75,10 @@ void dt_comp_unpack::render() {
 
     ImGui::SameLine(0.0f, 5.0f);
     if (ImGui::Button("Select##Output", { 125.0f, 21.0f })) {
-        //file_dialog::select_folder(m_output);
+        auto result = dvsku::dv_util_dialog::select_dir("Output dir", m_output);
+
+        if (!result.empty())
+            m_output = result;
     }
 
     ImGui::Dummy({ 0.0f, 10.0f });
@@ -54,23 +96,18 @@ void dt_comp_unpack::render() {
     ImVec2 avail = ImGui::GetContentRegionMax();
     ImGui::SetCursorPosX((avail.x) / 2 - (125 / 2.0f));
 
-    bool cannot_start = m_input.empty() || m_output.empty() || !m_cancel;
+    bool cannot_start = m_input.empty() || m_output.empty() || m_cancel;
 
     if (cannot_start)
         ImGui::BeginDisabled();
 
     if (!is_working) {
-        if (ImGui::Button("Unpack##Unpack", { 125, 20 })) {
-            //m_components.systems.evp.set_start_callback([&]() { handle_on_start(); });
-            //m_components.systems.evp.set_finish_callback([&](bool success) { handle_on_finish(success); });
-            //m_components.systems.evp.set_update_callback([&](float value) { handle_on_update(value); });
-            //m_components.systems.evp.set_error_callback([&](const std::string& msg) { handle_on_error(msg); });
-
-            //m_components.systems.evp.unpack(m_input, m_output, m_decrypt, m_key, m_iv);
+        if (ImGui::Button("Unpack##Unpack", { 125.0f, 21.0f })) {
+            m_app.get_systems().evp.unpack(m_input, m_output, &m_context);
         }
     }
     else {
-        if (ImGui::Button("Cancel##Cancel", { 125, 20 })) {
+        if (ImGui::Button("Cancel##Cancel", { 125.0f, 21.0f })) {
             m_cancel = true;
         }
     }
diff --git a/source/src/gui/dt_comp_unpack.hpp b/source/src/gui/dt_comp_unpack.hpp
index 00136a8..05f342c 100644
--- a/source/src/gui/dt_comp_unpack.hpp
+++ b/source/src/gui/dt_comp_unpack.hpp
@@ -2,6 +2,10 @@
 
 #include "gui/dt_gui_base.hpp"
 
+#include <string>
+#include <mutex>
+#include <libevp.hpp>
+
 namespace dvsku_toolkit {
     class dt_comp_unpack : public dt_gui_base {
     public:
@@ -23,5 +27,8 @@ namespace dvsku_toolkit {
         int         m_filter   = 0U;
         float       m_progress = 0.0f;
         bool        m_cancel   = false;
+
+        std::mutex          m_mutex;
+        libevp::evp_context m_context;
     };
 }
\ No newline at end of file
diff --git a/source/src/systems/dt_sys_evp.cpp b/source/src/systems/dt_sys_evp.cpp
index 3ed3a9f..701f4c1 100644
--- a/source/src/systems/dt_sys_evp.cpp
+++ b/source/src/systems/dt_sys_evp.cpp
@@ -3,4 +3,12 @@
 using namespace dvsku_toolkit;
 
 ///////////////////////////////////////////////////////////////////////////////
-// PUBLIC
\ No newline at end of file
+// PUBLIC
+
+void dt_sys_evp::pack(const std::string& input, const std::string& output, int filter, libevp::evp_context* context) {
+    m_evp.pack_async(input, output, (libevp::evp_filter)filter, context);
+}
+
+void dt_sys_evp::unpack(const std::string& input, const std::string& output, libevp::evp_context* context) {
+    m_evp.unpack_async(input, output, context);
+}
diff --git a/source/src/systems/dt_sys_evp.hpp b/source/src/systems/dt_sys_evp.hpp
index ed7bf63..40f9ecd 100644
--- a/source/src/systems/dt_sys_evp.hpp
+++ b/source/src/systems/dt_sys_evp.hpp
@@ -2,6 +2,8 @@
 
 #include "systems/dt_system_base.hpp"
 
+#include <libevp.hpp>
+
 namespace dvsku_toolkit {
     class dt_app;
 
@@ -16,5 +18,12 @@ namespace dvsku_toolkit {
 
         dt_sys_evp(dt_app& app)
             : dt_system_base(app) {};
+
+    public:
+        void pack(const std::string& input, const std::string& output, int filter, libevp::evp_context* context = nullptr);
+        void unpack(const std::string& input, const std::string& output, libevp::evp_context* context = nullptr);
+
+    private:
+        libevp::evp m_evp;
     };
 }
\ No newline at end of file