diff --git a/KeyBorad/KeyBorad/APP/AppMainWindow.cpp b/KeyBorad/KeyBorad/APP/AppMainWindow.cpp
new file mode 100644
index 0000000..0bcc897
--- /dev/null
+++ b/KeyBorad/KeyBorad/APP/AppMainWindow.cpp
@@ -0,0 +1,44 @@
+#include "APP/AppMainWindow.h"
+
+#include "APP/AppKeyboardPage.h"
+#include "APP/AppSettingsPage.h"
+#include "APP/AppTheme.h"
+
+#include <QtWidgets/QTabWidget>
+#include <QtWidgets/QVBoxLayout>
+
+namespace APP
+{
+
+App_MainWindow::App_MainWindow(QWidget* p_Parent)
+    : QWidget(p_Parent)
+{
+    setWindowTitle(QStringLiteral("KeyBorad"));
+    resize(860, 760);
+    setStyleSheet(App_Theme_BuildWindowStyleSheet());
+
+    QVBoxLayout* const p_RootLayout = new QVBoxLayout(this);
+    p_RootLayout->setContentsMargins(20, 20, 20, 20);
+    p_RootLayout->setSpacing(12);
+
+    appTabWidget = new QTabWidget(this);
+    appKeyboardPage = new App_KeyboardPage(appTabWidget);
+    appSettingsPage = new App_SettingsPage(appTabWidget);
+
+    appTabWidget->addTab(appKeyboardPage, QStringLiteral("Keyboard"));
+    appTabWidget->addTab(appSettingsPage, QStringLiteral("Settings"));
+
+    p_RootLayout->addWidget(appTabWidget);
+}
+
+App_KeyboardPage* App_MainWindow::App_Func_GetKeyboardPage() const
+{
+    return appKeyboardPage;
+}
+
+App_SettingsPage* App_MainWindow::App_Func_GetSettingsPage() const
+{
+    return appSettingsPage;
+}
+
+} // namespace APP
diff --git a/KeyBorad/KeyBorad/APP/AppMainWindow.h b/KeyBorad/KeyBorad/APP/AppMainWindow.h
new file mode 100644
index 0000000..6907c05
--- /dev/null
+++ b/KeyBorad/KeyBorad/APP/AppMainWindow.h
@@ -0,0 +1,27 @@
+#pragma once
+
+#include <QtWidgets/QWidget>
+
+class QTabWidget;
+
+namespace APP
+{
+
+class App_KeyboardPage;
+class App_SettingsPage;
+
+class App_MainWindow : public QWidget
+{
+public:
+    explicit App_MainWindow(QWidget* p_Parent = nullptr);
+
+    App_KeyboardPage* App_Func_GetKeyboardPage() const;
+    App_SettingsPage* App_Func_GetSettingsPage() const;
+
+private:
+    QTabWidget* appTabWidget = nullptr;
+    App_KeyboardPage* appKeyboardPage = nullptr;
+    App_SettingsPage* appSettingsPage = nullptr;
+};
+
+} // namespace APP