diff -r 22baafbf770d -r f8474f2c5db9 src/MainWindow.h
--- a/src/MainWindow.h	Fri Feb 11 16:00:06 2022 +0100
+++ b/src/MainWindow.h	Sat Feb 12 21:24:43 2022 +0100
@@ -1,6 +1,8 @@
 #ifndef _MAINWINDOW_H
 #define _MAINWINDOW_H
 
+#include "InventorySuppliers.h"
+
 #include <QMainWindow>
 #include <QStandardItemModel>
 #include <QMenu>
@@ -20,12 +22,17 @@
 
 private slots:
     void on_actionExit_triggered();
+    void on_actionSuppliers_triggered();
     void on_actionAbout_triggered();
 
 public slots:
+    void fromInventorySuppliers();
 
 private:
     Ui::MainWindow *ui;
+
+    // Keep pointers to new windows.
+    InventorySuppliers *InventorySuppliersWindow;
 };
 
 #endif