virtual Image MouseEvent(int event, Point p, int zdelta, dword keyflags)
virtual void MouseEnter(Point p, dword keyflags)
virtual void MouseLeave()

#include <CtrlLib/CtrlLib.h>

using namespace Upp;


struct MyApp : TopWindow {
	Point pos;
	Rect  area;
	MyApp()
	{
		Sizeable().Zoomable().CenterScreen().SetRect(0,0, 1024, 800);
	}
	
	void Paint(Draw& w) override
	{
		w.DrawRect(GetSize(), Black());
		w.DrawRect(area, area.Contains(pos) ? Yellow() : Red());
		w.DrawText(10, 10, AsString(pos), Monospace(16), White());
	}
	
	void MouseMove(Point p, dword keyflags) override
	{
		pos = p;
		Tip(area.Contains(p) ? t_("\1This is a [* Rich[/ text tip ]]") : nullptr);
		Refresh();
		
	}
	
	void Layout() override
	{
		area =  GetView().CenterRect(GetSize() / 4);
	}
};

GUI_APP_MAIN
{
	MyApp().Run();
}

#include <CtrlLib/CtrlLib.h>

using namespace Upp;


struct MyApp : TopWindow {
	Rect  area;
	MyApp()
	{
		Sizeable().Zoomable().CenterScreen().SetRect(0,0, 1024, 800);
	}
	
	void Paint(Draw& w) override
	{
		Point pt = GetMouseViewPos(); // This method returns the mouse cursor position relative to the Ctrl's view area.
		w.DrawRect(GetSize(), Black());
		w.DrawRect(area, area.Contains(pt) ? Yellow() : Red());
		w.DrawText(10, 10, AsString(pt), Monospace(16), White());
	}
	
	void MouseMove(Point pt, dword keyflags) override
	{
		// Dispatched when the mouse cursor moves. It CAN also be used to retrieve and store the mouse position.
		// ( instead of GetMouseViewPos() )
		Tip(area.Contains(pt) ? t_("\1This is a [* Rich[/ text tip ]]") : nullptr);
		Refresh();
		
	}
	
	void Layout() override
	{
		area =  GetView().CenterRect(GetSize() / 4);
	}
};

GUI_APP_MAIN
{
	MyApp().Run();
}

#include <CtrlLib/CtrlLib.h>

using namespace Upp;

struct MyCtrl : Ctrl {
	void Paint(Draw& w) override
	{
		Point pt = GetMouseViewPos();
		w.DrawRect(GetSize(), GetView().Contains(pt) ? Yellow : Red());
	}
	
	void MouseEnter(Point p, dword keyflags) override
	{
		Refresh();
	}
	
	void MouseLeave() override
	{
		Refresh();
	}

	void LeftDouble(Point p, dword keyflags) override
	{
		PromptOK("Ctrl double-clicked");
	}
};

struct MyApp : TopWindow {
	MyCtrl myctrl;
	MyApp()
	{
		Sizeable().Zoomable().CenterScreen().SetRect(0,0, 1024, 800);
		Add(myctrl.Tip(t_("\1This is a [* Rich[/ text tip ]]")));  // Set tip for child ctrl.
	}
	
	void Paint(Draw& w) override
	{
		Point pt = GetMouseViewPos(); // This method returns the mouse cursor position within the Ctrl's view area.
		w.DrawRect(GetSize(), Black());
		w.DrawText(10, 10, AsString(pt), Monospace(16), White());
	}
	
	void MouseMove(Point pt, dword keyflags) override
	{
		Refresh();
		
	}
	
	void Layout() override
	{
		myctrl.SetRect(GetView().CenterRect(GetSize() / 4));
	}
};

GUI_APP_MAIN
{
	MyApp().Run();
}

void MyGraph::Hover()
{
 if(m_bTrackingHover)
  {
   m_bTrackingHover = false;

   Point P = GetMouseViewPos();
   
   if(P == m_MousePos)
    {
     // Mouse is hovering 

     // TODO: Call ShowHint() with text
    }
  }
}

Image MyGraph::MouseEvent(int event, Point p, int zdelta, dword keyflags)
{
 switch(event)
  {
   case Ctrl::MOUSELEAVE:
     
     if(m_bTrackingHover)
      {
       m_bTrackingHover = false;
     
       KillTimeCallback(HOVER_TIMER);
      }
     else
       if(!m_pHint)
         CloseHint();
       
     break;
         
   case Ctrl::MOUSEMOVE:

     if(!m_pHint)
      {
       m_MousePos.x     = p.x;
       m_MousePos.y     = p.y;
       m_bTrackingHover = true;
     
       KillSetTimeCallback(1000, THISBACK(Hover), HOVER_TIMER);
      }
      
     break;
  }
   
 return Image::Arrow();
}

#include <CtrlLib/CtrlLib.h>

using namespace Upp;

struct RectArea : Moveable<RectArea> {
	Rect r;
	String text;
};

struct MyApp : TopWindow {
	Vector<RectArea> ra;
	MyApp()
	{
		Sizeable().Zoomable().CenterScreen().SetRect(0,0, 1024, 800);
		
		for(int i = 0; i < 50; i++) {
			RectArea& r = ra.Add();
			r.r = RectC(20 * i, 20 * i, 20, 20);
			r.text  << "\1[* Index: ]" << i << " &[* Random number: ]" << Random();
		}
	}
	
	void Paint(Draw& w) override
	{
		w.DrawRect(GetSize(), Black());
		for(const RectArea& r : ra)
			w.DrawRect(r.r, Red());
	}
	
	void MouseMove(Point pt, dword keyflags) override
	{
		// Dont forget to call the parent ctrl's MouseMove, if it is utilized!
		
		if(HasFocus() && ra.GetCount()) {
			for(const RectArea& r : ra)
				if(r.r.Contains(pt)) {
					Tip(r.text);
					return;
				}
			Tip(nullptr);
		}
	}
};

GUI_APP_MAIN
{
	MyApp().Run();
}