class CMyApp:public CWinApp
{
public:
	virtual BOOL InitInstance();
};
class CMainWindow:public CFrameWnd
{
protected:
	BOOL m_bTracking;
	BOOL m_bCaptureEnabled;
	CPoint m_ptFrom;
	CPoint m_ptTo;
	HCURSOR m_hCursorArrow;
	HCURSOR m_hCursorIBeam;
	void InvertLine(CDC *pDC,CPoint ptFrom,CPoint ptTo);
public:
	CMainWindow();
protected:
	afx_msg void OnLButtonDown(UINT nFlags,CPoint point);
	afx_msg void OnLButtonUp(UINT nFlags,CPoint point);
	afx_msg void OnMouseMove(UINT nFlags,CPoint point);
	afx_msg void OnNcLButtonDown(UINT nHitTest,CPoint point);
	afx_msg void OnSize(UINT nType,int cx,int cy);
	afx_msg BOOL OnSetCursor(CWnd* pWnd,UINT nHitTest,UINT message);
	DECLARE_MESSAGE_MAP()
};

#include <afxwin.h>
#include "MouseCap.h"

CMyApp myApp;
BOOL CMyApp::InitInstance()
{
	m_pMainWnd=new CMainWindow;
	m_pMainWnd->ShowWindow(m_nCmdShow);
	m_pMainWnd->UpdateWindow();
	return TRUE;
}
BEGIN_MESSAGE_MAP(CMainWindow,CFrameWnd)
ON_WM_LBUTTONDOWN()
ON_WM_LBUTTONUP()
ON_WM_MOUSEMOVE()
ON_WM_NCLBUTTONDOWN()
ON_WM_SIZE()
ON_WM_SETCURSOR()
END_MESSAGE_MAP()

CMainWindow::CMainWindow()
{
	m_hCursorArrow=::LoadCursor(NULL,IDC_ARROW);
	m_hCursorIBeam=::LoadCursor(NULL,IDC_IBEAM);
	m_bTracking=FALSE;
	m_bCaptureEnabled=TRUE;
	//Register a WNDCLASS
	CString strWndClass=AfxRegisterWndClass(0,AfxGetApp()->LoadStandardCursor(IDC_CROSS),(HBRUSH)(COLOR_WINDOW+1),AfxGetApp()->LoadStandardIcon(IDI_WINLOGO));
	//Create a window
	Create(strWndClass,_T("Mouse Capture Demo(Capture Enabled)"));
}
void CMainWindow::OnLButtonDown(UINT nFlags,CPoint point)
{
	m_ptFrom=point;
	m_ptTo=point;
	m_bTracking=TRUE;
	if(m_bCaptureEnabled)
	{
		SetCapture();
	}
}
void CMainWindow::OnMouseMove(UINT nFlags,CPoint point)
{
	if(m_bTracking)
	{
		CClientDC dc(this);
		InvertLine(&dc,m_ptFrom,m_ptTo);
		InvertLine(&dc,m_ptFrom,point);
		m_ptTo=point;
	}
}
void CMainWindow::OnLButtonUp(UINT nFlags,CPoint point)
{
	if(m_bTracking)
	{
		m_bTracking=FALSE;
		if(GetCapture()==this)
			::ReleaseCapture();
		CClientDC dc(this);
		InvertLine(&dc,m_ptFrom,m_ptTo);
		CPen pen(PS_SOLID,16,RGB(255,0,0));
		dc.SelectObject(&pen);
		dc.MoveTo(m_ptFrom);
		dc.LineTo(point);
	}
}
void CMainWindow::OnNcLButtonDown(UINT nHitTest,CPoint point)
{
	if(nHitTest==HTCAPTION)
	{
		m_bCaptureEnabled=m_bCaptureEnabled?FALSE:TRUE;
		SetWindowText(m_bCaptureEnabled?_T("Mouse Capture Demo(Capture Enabled)"):_T("Mouse Capture Demo(Capture Disabled)"));

	}
	CFrameWnd::OnNcLButtonDown(nHitTest,point);
}
void CMainWindow::InvertLine(CDC *pDC,CPoint ptFrom,CPoint ptTo)
{
	int nOldMode=pDC->SetROP2(R2_NOT);
	pDC->MoveTo(ptFrom);
	pDC->LineTo(ptTo);
	pDC->SetROP2(nOldMode);
}
void CMainWindow::OnSize(UINT nType,int cx,int cy)
{
	CFrameWnd::OnSize(nType,cx,cy);
}
BOOL CMainWindow::OnSetCursor(CWnd *pWnd,UINT nHitTest,UINT message)
{
	if(nHitTest==HTCLIENT)
	{
		DWORD dwPos=::GetMessagePos();
		CPoint point(LOWORD(dwPos),HIWORD(dwPos));
		ScreenToClient(&point);
		CRect rect;
		GetClientRect(&rect);
		::SetCursor((point.y<rect.Height()/2)?m_hCursorArrow:m_hCursorIBeam);
		return TRUE;
	}
}
//DEL void CMainWindow::OnPaint()
//DEL {
//DEL 	CFrameWnd::OnPaint();
//DEL }

// 3.cpp : Defines the entry point for the application.
//

#include "stdafx.h"
#include "resource.h"

#define MAX_LOADSTRING 100

// Global Variables:
HINSTANCE hInst;								// current instance
TCHAR szTitle[MAX_LOADSTRING];								// The title bar text
TCHAR szWindowClass[MAX_LOADSTRING];								// The title bar text

// Foward declarations of functions included in this code module:
ATOM				MyRegisterClass(HINSTANCE hInstance);
BOOL				InitInstance(HINSTANCE, int);
LRESULT CALLBACK	WndProc(HWND, UINT, WPARAM, LPARAM);
LRESULT CALLBACK	About(HWND, UINT, WPARAM, LPARAM);

int APIENTRY WinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPSTR     lpCmdLine,
                     int       nCmdShow)
{
 	// TODO: Place code here.
	MSG msg;
	HACCEL hAccelTable;

	// Initialize global strings
	LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
	LoadString(hInstance, IDC_MY3, szWindowClass, MAX_LOADSTRING);
	MyRegisterClass(hInstance);

	// Perform application initialization:
	if (!InitInstance (hInstance, nCmdShow)) 
	{
		return FALSE;
	}

	hAccelTable = LoadAccelerators(hInstance, (LPCTSTR)IDC_MY3);

	// Main message loop:
	while (GetMessage(&msg, NULL, 0, 0)) 
	{
		if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg)) 
		{
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}
	}

	return msg.wParam;
}



//
//  FUNCTION: MyRegisterClass()
//
//  PURPOSE: Registers the window class.
//
//  COMMENTS:
//
//    This function and its usage is only necessary if you want this code
//    to be compatible with Win32 systems prior to the 'RegisterClassEx'
//    function that was added to Windows 95. It is important to call this function
//    so that the application will get 'well formed' small icons associated
//    with it.
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
	WNDCLASSEX wcex;

	wcex.cbSize = sizeof(WNDCLASSEX); 

	wcex.style			= CS_HREDRAW | CS_VREDRAW;
	wcex.lpfnWndProc	= (WNDPROC)WndProc;
	wcex.cbClsExtra		= 0;
	wcex.cbWndExtra		= 0;
	wcex.hInstance		= hInstance;
	wcex.hIcon			= LoadIcon(hInstance, (LPCTSTR)IDI_MY3);
	wcex.hCursor		= LoadCursor(NULL, IDC_ARROW);
	wcex.hbrBackground	= (HBRUSH)(COLOR_WINDOW+1);
	wcex.lpszMenuName	= (LPCSTR)IDC_MY3;
	wcex.lpszClassName	= szWindowClass;
	wcex.hIconSm		= LoadIcon(wcex.hInstance, (LPCTSTR)IDI_SMALL);

	return RegisterClassEx(&wcex);
}

//
//   FUNCTION: InitInstance(HANDLE, int)
//
//   PURPOSE: Saves instance handle and creates main window
//
//   COMMENTS:
//
//        In this function, we save the instance handle in a global variable and
//        create and display the main program window.
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
   HWND hWnd;

   hInst = hInstance; // Store instance handle in our global variable

   hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
      CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);

   if (!hWnd)
   {
      return FALSE;
   }

   ShowWindow(hWnd, nCmdShow);
   UpdateWindow(hWnd);

   return TRUE;
}

//
//  FUNCTION: WndProc(HWND, unsigned, WORD, LONG)
//
//  PURPOSE:  Processes messages for the main window.
//
//  WM_COMMAND	- process the application menu
//  WM_PAINT	- Paint the main window
//  WM_DESTROY	- post a quit message and return
//
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	int wmId, wmEvent;
	PAINTSTRUCT ps;
	HDC hdc;
	TCHAR szHello[MAX_LOADSTRING];
	LoadString(hInst, IDS_HELLO, szHello, MAX_LOADSTRING);

	switch (message) 
	{
		case WM_COMMAND:
			wmId    = LOWORD(wParam); 
			wmEvent = HIWORD(wParam); 
			// Parse the menu selections:
			switch (wmId)
			{
				case IDM_ABOUT:
				   DialogBox(hInst, (LPCTSTR)IDD_ABOUTBOX, hWnd, (DLGPROC)About);
				   break;
				case IDM_EXIT:
				   DestroyWindow(hWnd);
				   break;
				default:
				   return DefWindowProc(hWnd, message, wParam, lParam);
			}
			break;
		case WM_PAINT:
			hdc = BeginPaint(hWnd, &ps);
			// TODO: Add any drawing code here...
			RECT rt;
			GetClientRect(hWnd, &rt);
			DrawText(hdc, szHello, strlen(szHello), &rt, DT_CENTER);
			EndPaint(hWnd, &ps);
			break;
		[COLOR="red"]case WM_LBUTTONDOWN:
			{
				HDC hdc=GetDC(hWnd);
				MoveToEx(hdc,20,30,NULL);
				LineTo(hdc,300,400);
				ReleaseDC(hWnd,hdc);
			}
			break;[/COLOR]		case WM_DESTROY:
			PostQuitMessage(0);
			break;
		default:
			return DefWindowProc(hWnd, message, wParam, lParam);
   }
   return 0;
}

// Mesage handler for about box.
LRESULT CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
	switch (message)
	{
		case WM_INITDIALOG:
				return TRUE;

		case WM_COMMAND:
			if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL) 
			{
				EndDialog(hDlg, LOWORD(wParam));
				return TRUE;
			}
			break;
	}
    return FALSE;
}

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