diff --git a/src/dlangide/ui/commands.d b/src/dlangide/ui/commands.d
index 804eabb..398b4fa 100644
--- a/src/dlangide/ui/commands.d
+++ b/src/dlangide/ui/commands.d
@@ -1,11 +1,14 @@
 module dlangide.ui.commands;
 
+import dlangui.core.events;
+
 enum IDEActions : int {
     None = 0,
-    FileOpen = 10000,
+    ProjectOpen = 1010000,
+    FileOpen,
     FileClose,
     FileExit,
-    EditCopy = 11000,
+    EditCopy = 1011000,
     EditPaste,
     EditCut,
     EditUndo,
diff --git a/src/dlangide/ui/frame.d b/src/dlangide/ui/frame.d
index 6fb475d..a497c12 100644
--- a/src/dlangide/ui/frame.d
+++ b/src/dlangide/ui/frame.d
@@ -116,7 +116,7 @@ class IDEFrame : VerticalLayout, MenuItemClickHandler {
                     UIString caption;
                     caption = "Open Text File"d;
                     FileDialog dlg = new FileDialog(caption, window, null);
-                    dlg.onDialogResult = delegate(Dialog dlg, Action result) {
+                    dlg.onDialogResult = delegate(Dialog dlg, const Action result) {
                         //
                     };
                     dlg.show();
diff --git a/src/dlangide/workspace/project.d b/src/dlangide/workspace/project.d
new file mode 100644
index 0000000..0cda313
--- /dev/null
+++ b/src/dlangide/workspace/project.d
@@ -0,0 +1,6 @@
+module dlangide.workspace.project;
+
+/// DLANGIDE D project
+class Project {
+}
+
diff --git a/src/dlangide/workspace/workspace.d b/src/dlangide/workspace/workspace.d
new file mode 100644
index 0000000..1d719a7
--- /dev/null
+++ b/src/dlangide/workspace/workspace.d
@@ -0,0 +1,11 @@
+module dlangide.workspace.workspace;
+
+import dlangide.workspace.project;
+
+/// DlangIDE workspace
+class Workspace {
+    protected string _dir;
+    protected dstring _name;
+    protected dstring _description;
+    protected Project[] _projects;
+}
diff --git a/workspaces/sample1/sample1.dlangidews b/workspaces/sample1/sample1.dlangidews
new file mode 100644
index 0000000..b7ea1a0
--- /dev/null
+++ b/workspaces/sample1/sample1.dlangidews
@@ -0,0 +1,8 @@
+{
+	"name": "sample1",
+	"description": "Sample workspace 1 for testing of DLANG IDE",
+	"projects": {
+		"sampleproject1": "./sampleproject1",
+		"sampleproject2": "./sampleproject2",
+	}
+}
diff --git a/workspaces/sample1/sample1.dlangidews.settings b/workspaces/sample1/sample1.dlangidews.settings
new file mode 100644
index 0000000..0961adf
--- /dev/null
+++ b/workspaces/sample1/sample1.dlangidews.settings
@@ -0,0 +1,3 @@
+{
+	"dub": "dub"
+}
diff --git a/workspaces/sample1/sampleproject1/dub.json b/workspaces/sample1/sampleproject1/dub.json
new file mode 100644
index 0000000..70a1d94
--- /dev/null
+++ b/workspaces/sample1/sampleproject1/dub.json
@@ -0,0 +1,11 @@
+{
+    "name": "sampleproject1",
+    "description": "dlangide sample project 1",
+    "homepage": "https://github.com/buggins/dlangide",
+    "license": "Boost",
+    "authors": ["Vadim Lopatin"],
+
+    "targetName": "sample1",
+    "targetPath": "bin",
+    "targetType": "executable",
+}
diff --git a/workspaces/sample1/sampleproject1/sampleproject1.settings b/workspaces/sample1/sampleproject1/sampleproject1.settings
new file mode 100644
index 0000000..2c63c08
--- /dev/null
+++ b/workspaces/sample1/sampleproject1/sampleproject1.settings
@@ -0,0 +1,2 @@
+{
+}
diff --git a/workspaces/sample1/sampleproject1/source/main.d b/workspaces/sample1/sampleproject1/source/main.d
new file mode 100644
index 0000000..d5df88b
--- /dev/null
+++ b/workspaces/sample1/sampleproject1/source/main.d
@@ -0,0 +1,16 @@
+#!/usr/bin/env rdmd
+// Computes average line length for standard input.
+import std.stdio;
+
+void main()
+{
+    ulong lines = 0;
+    double sumLength = 0;
+    foreach (line; stdin.byLine())
+    {
+        ++lines;
+        sumLength += line.length;
+    }
+    writeln("Average line length: ",
+        lines ? sumLength / lines : 0);
+}
diff --git a/workspaces/sample1/sampleproject2/dub.json b/workspaces/sample1/sampleproject2/dub.json
new file mode 100644
index 0000000..84cb24a
--- /dev/null
+++ b/workspaces/sample1/sampleproject2/dub.json
@@ -0,0 +1,11 @@
+{
+    "name": "sampleproject2",
+    "description": "dlangide sample project 2",
+    "homepage": "https://github.com/buggins/dlangide",
+    "license": "Boost",
+    "authors": ["Vadim Lopatin"],
+
+    "targetName": "sample2",
+    "targetPath": "bin",
+    "targetType": "executable",
+}
diff --git a/workspaces/sample1/sampleproject2/sampleproject2.settings b/workspaces/sample1/sampleproject2/sampleproject2.settings
new file mode 100644
index 0000000..2c63c08
--- /dev/null
+++ b/workspaces/sample1/sampleproject2/sampleproject2.settings
@@ -0,0 +1,2 @@
+{
+}
diff --git a/workspaces/sample1/sampleproject2/source/main.d b/workspaces/sample1/sampleproject2/source/main.d
new file mode 100644
index 0000000..d5df88b
--- /dev/null
+++ b/workspaces/sample1/sampleproject2/source/main.d
@@ -0,0 +1,16 @@
+#!/usr/bin/env rdmd
+// Computes average line length for standard input.
+import std.stdio;
+
+void main()
+{
+    ulong lines = 0;
+    double sumLength = 0;
+    foreach (line; stdin.byLine())
+    {
+        ++lines;
+        sumLength += line.length;
+    }
+    writeln("Average line length: ",
+        lines ? sumLength / lines : 0);
+}