Tried something, it kinda works

BaseButtonInstance.cpp

@@ -11,6 +11,7 @@ ButtonListener* listener = NULL;
 BaseButtonInstance::BaseButtonInstance(void)
 {
 	listener = NULL;
+	initProperties();
 }
 
 void BaseButtonInstance::render(RenderDevice* rd)

DataModelInstance.cpp

@@ -14,6 +14,7 @@ DataModelInstance::DataModelInstance(void)
 	mousey = 0;
 	mouseButton1Down = false;
 	showMessage = false;
+	initProperties();
 }
 
 DataModelInstance::~DataModelInstance(void)

ImageButtonInstance.cpp

@@ -21,6 +21,7 @@ ImageButtonInstance::ImageButtonInstance(G3D::TextureRef newImage, G3D::TextureR
 	floatRight = false;
 	disabled = false;
 	className = "ImageButton";
+	initProperties();
 }
 
 ImageButtonInstance::~ImageButtonInstance(void)

Instance.cpp

@@ -15,6 +15,7 @@ Instance::Instance(const Instance &oinst)
 	setParent(oinst.parent);
 	name = oinst.name;
 	className = oinst.className;
+	initProperties();
 }
 
 void Instance::render(RenderDevice* rd)
@@ -25,6 +26,24 @@ void Instance::render(RenderDevice* rd)
 	}
 }
 
+void Update(PROPGRIDITEM)
+{
+
+}
+
+void Instance::initProperties()
+{
+	::PROPGRIDITEM pItem;
+	pItem.lpszCatalog="Test";
+	pItem.lpszPropName="Offset";
+	pItem.lpszzCmbItems="What";
+	pItem.lpszPropDesc="Description";
+	pItem.lpCurValue=(LPARAM)"0, 0, 0";
+	properties.push_back(Property(pItem, Update));
+}
+
+
+
 Instance::~Instance(void)
 {
 	for(size_t i = 0; i < children.size(); i++)

Instance.h

@@ -5,6 +5,7 @@
 class Instance
 {
 public:
+	std::vector<Property> properties;
 	Instance(void);
 	Instance(const Instance&);
 	virtual ~Instance(void);
@@ -23,4 +24,5 @@ public:
 protected:
 	std::string className;
 	Instance* parent;  // Another pointer.
+	void initProperties();
 };

PhysicalInstance.cpp

@@ -19,6 +19,7 @@ PhysicalInstance::PhysicalInstance(void)
 	back = Smooth;
 	left = Smooth;
 	bottom = Smooth;
+	initProperties();
 }
 
 PhysicalInstance::PhysicalInstance(const PhysicalInstance &oinst)

PropertyWindow.cpp

@@ -1,7 +1,7 @@
 #define _WINSOCKAPI_
 #include <windows.h>
 #include "WindowFunctions.h"
-#include "propertyGrid.h"
+#include "Property.h"
 #include "resource.h"
 #include "PropertyWindow.h"
 
@@ -111,4 +111,11 @@ void PropertyWindow::_redraw()
 
 void PropertyWindow::SetProperties(Instance * instance)
 {
+	PropGrid_ResetContent(_propGrid);
+	for(size_t i = 0; i < instance->properties.size(); i++)
+	{
+		PropGrid_AddItem(_propGrid, &instance->properties.at(i));
+	}
+	SetWindowLongPtr(_propGrid,GWL_USERDATA,(LONG)this);
+	_redraw();
 }

TextButtonInstance.cpp

@@ -20,6 +20,7 @@ TextButtonInstance::TextButtonInstance(void)
 	visible = true;
 	className = "TextButton";
 	disabled = false;
+	initProperties();
 }
 
 bool TextButtonInstance::mouseInButton(float mousex, float mousey, RenderDevice* rd)

WorkspaceInstance.cpp

@@ -6,6 +6,7 @@ WorkspaceInstance::WorkspaceInstance(void)
 	className = "Workspace";
 	timer = 60.0F;
 	score = 0;
+	initProperties();
 }
 
 WorkspaceInstance::~WorkspaceInstance(void)

main.cpp

@@ -1269,6 +1269,7 @@ void Demo::onMouseLeftPressed(HWND hwnd,int x,int y)
 						while(selectedInstances.size() > 0)
 							selectedInstances.erase(selectedInstances.begin());
 						selectedInstances.push_back(test);
+						_propWindow->SetProperties(test);
 						//message = "Dragging = true.";
 						//messageTime = System::time();
 						//dragging = true;