how to create a line between two clicks using menu in vc++ - visual-c++

Question

I am trying to create a paint application where in i am using a menu to show the shapes i can draw and i have added some shapes such as line,rectangle,circle but i am unable to use the OnLButtonDown function within the line function so i would like to know how can i create a line between two clicks by not using LButtonDown function and any other way by which i can create a line when user clicks on the menu my sample code is pasted below:
#include<afxwin.h>
#include"resource.h"
class myframe:public CFrameWnd
{
public:
myframe()
{
Create(0,"simple",WS_OVERLAPPEDWINDOW,rectDefault,0,MAKEINTRESOURCE(IDR_MENU1));
}
void shape(int id)
{
CClientDC d(this);
CPen p;
p.CreatePen(PS_SOLID,1,RGB(255,0,0));
d.SelectObject(&p);
switch(id)
{
case 101:
d.MoveTo(100,100);
d.LineTo(200,200);
break;
case 102:
d.Rectangle(10,10,100,200);
break;
case 103:
d.Ellipse(20,20,100,100);
break;
}
}
DECLARE_MESSAGE_MAP()
};
BEGIN_MESSAGE_MAP(myframe,CFrameWnd)
ON_COMMAND_RANGE(101,103,shape)
END_MESSAGE_MAP()
class myapp:public CWinApp
{
public:
int InitInstance()
{
myframe *f;
f=new myframe();
f->ShowWindow(3);
m_pMainWnd=f;
return 1;
}
};
myapp a;

Answer 1

Several years ago, Microsoft published a sample application written in MFC that does exactly this.
It's called Scribble, and you can download it and following along with the written tutorial here.
Once you've done that, you can learn how to upgrade an existing MFC application to use the new Ribbon user interface. That tutorial is available here: Updating the MFC Scribble Application