diff --git a/LICENSE b/LICENSE
index d6a83e7..f8f56ca 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright (c) 2025, Milsko Desktop Experience development team
+Copyright (c) 2025, MDE Development Team
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
diff --git a/core/CMakeLists.txt b/core/CMakeLists.txt
index d4127c6..47462f5 100644
--- a/core/CMakeLists.txt
+++ b/core/CMakeLists.txt
@@ -1 +1,6 @@
 setup_lib(core Core)
+target_link_libraries(
+	MDECore
+	PRIVATE
+	Mw
+)
diff --git a/core/aboutdialog.c b/core/aboutdialog.c
new file mode 100644
index 0000000..1c5fb98
--- /dev/null
+++ b/core/aboutdialog.c
@@ -0,0 +1,59 @@
+#include <MDE/Core/AboutDialog.h>
+
+#define Copyright "Copyright (C) 2025 MDE Development Team"
+
+static void ok_activate(MwWidget handle, void* user, void* client) {
+	MwDestroyWidget(user);
+}
+
+MwWidget MDEAboutDialog(MwWidget handle, const char* appname, const char* version, MwLLPixmap pixmap) {
+	MwWidget    w, p, l, l2, l3, ok;
+	MwSizeHints sh;
+	int	    x = MwDEFAULT, y = MwDEFAULT;
+	const int   iw = 64 + 32;
+	const int   bh = 24, bw = bh * 3;
+	int	    ww = 320, wh = 5 + iw + 5 + (16 + 5) * 3 + 10 + bh + 5;
+	char	    buf[512];
+
+	if(handle != NULL) {
+		x = MwGetInteger(handle, MwNx) + (MwGetInteger(handle, MwNwidth) - ww) / 2;
+		y = MwGetInteger(handle, MwNy) + (MwGetInteger(handle, MwNheight) - wh) / 2;
+	}
+
+	sh.min_width = sh.max_width = ww;
+	sh.min_height = sh.max_height = wh;
+
+	w = MwVaCreateWidget(MwWindowClass, "about", NULL, x, y, ww, wh,
+			     MwNtitle, "About",
+			     MwNsizeHints, &sh,
+			     NULL);
+
+	p = MwVaCreateWidget(MwImageClass, "pic", w, (ww - iw) / 2, 5, iw, iw,
+			     MwNpixmap, pixmap,
+			     NULL);
+
+	l = MwVaCreateWidget(MwLabelClass, "label", w, 5, 5 + iw + 5, ww - 5 * 2, 16,
+			     MwNtext, appname,
+			     MwNbold, 1,
+			     NULL);
+
+	sprintf(buf, "Version %s", version);
+
+	l2 = MwVaCreateWidget(MwLabelClass, "label2", w, 5, 5 + iw + 5 + 16 + 5, ww - 5 * 2, 16,
+			      MwNtext, buf,
+			      NULL);
+
+	l3 = MwVaCreateWidget(MwLabelClass, "label3", w, 5, 5 + iw + 5 + 16 + 5 + 16 + 5 + 10, ww - 5 * 2, 16,
+			      MwNtext, Copyright,
+			      NULL);
+
+	ok = MwVaCreateWidget(MwButtonClass, "ok", w, ww - 5 - bw, 5 + iw + 5 + 16 + 5 + 16 + 5 + 10 + 16 + 5, bw, bh,
+			      MwNtext, "OK",
+			      NULL);
+
+	MwAddUserHandler(ok, MwNactivateHandler, ok_activate, w);
+
+	if(handle != NULL) MwReparent(w, handle);
+
+	return w;
+}
diff --git a/include/MDE/Core/AboutDialog.h b/include/MDE/Core/AboutDialog.h
new file mode 100644
index 0000000..3339a92
--- /dev/null
+++ b/include/MDE/Core/AboutDialog.h
@@ -0,0 +1,18 @@
+#ifndef __MDE_CORE_ABOUTIALOG_H__
+#define __MDE_CORE_ABOUTIALOG_H__
+
+#include <MDE/MachDep.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <Mw/Milsko.h>
+
+MwWidget MDEAboutDialog(MwWidget handle, const char* appname, const char* version, MwLLPixmap pixmap);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/include/MDE/Core/Directory.h b/include/MDE/Core/Directory.h
index fc56b49..67b4492 100644
--- a/include/MDE/Core/Directory.h
+++ b/include/MDE/Core/Directory.h
@@ -1,5 +1,5 @@
-#ifndef __MDE_DIRECTORY_H__
-#define __MDE_DIRECTORY_H__
+#ifndef __MDE_CORE_DIRECTORY_H__
+#define __MDE_CORE_DIRECTORY_H__
 
 #include <MDE/MachDep.h>
 
diff --git a/include/MDE/Core/File.h b/include/MDE/Core/File.h
index f521df1..3a60f15 100644
--- a/include/MDE/Core/File.h
+++ b/include/MDE/Core/File.h
@@ -1,5 +1,5 @@
-#ifndef __MDE_FILE_H__
-#define __MDE_FILE_H__
+#ifndef __MDE_CORE_FILE_H__
+#define __MDE_CORE_FILE_H__
 
 #include <MDE/MachDep.h>
 
diff --git a/include/MDE/Core/String.h b/include/MDE/Core/String.h
index 5b31ad0..a85e8b4 100644
--- a/include/MDE/Core/String.h
+++ b/include/MDE/Core/String.h
@@ -1,5 +1,5 @@
-#ifndef __MDE_STRING_H__
-#define __MDE_STRING_H__
+#ifndef __MDE_CORE_STRING_H__
+#define __MDE_CORE_STRING_H__
 
 #include <MDE/MachDep.h>
 
diff --git a/include/MDE/Core/Users.h b/include/MDE/Core/Users.h
index f92406c..baf8247 100644
--- a/include/MDE/Core/Users.h
+++ b/include/MDE/Core/Users.h
@@ -1,5 +1,5 @@
-#ifndef __MDE_USERS_H__
-#define __MDE_USERS_H__
+#ifndef __MDE_CORE_USERS_H__
+#define __MDE_CORE_USERS_H__
 
 #include <MDE/MachDep.h>
 
diff --git a/include/MDE/Foundation.h b/include/MDE/Foundation.h
index d881f6f..175c534 100644
--- a/include/MDE/Foundation.h
+++ b/include/MDE/Foundation.h
@@ -7,6 +7,7 @@
 #include <MDE/Core/String.h>
 #include <MDE/Core/Users.h>
 #include <MDE/Core/Directory.h>
+#include <MDE/Core/AboutDialog.h>
 
 #include <MDE/Audio/Audio.h>