?// rotationDlg.cpp : implementation file
//

#include "stdafx.h"
#include "rotation.h"
#include "rotationDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CRotationDlg dialog

CRotationDlg::CRotationDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CRotationDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CRotationDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CRotationDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CRotationDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CRotationDlg, CDialog)
	//{{AFX_MSG_MAP(CRotationDlg)
	ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CRotationDlg message handlers

BOOL CRotationDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	CenterWindow(GetDesktopWindow());	// center to the hpc screen

	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}



void CRotationDlg::OnButton1() 
{
	// TODO: Add your control notification handler code here
	HKEY    hRegKey;
	DWORD   status;
	DWORD   ValType;
	DWORD   ValLen;

	DWORD Rotation = 0;
	DEVMODE devmode = {0}; 
	devmode.dmSize = sizeof(DEVMODE); 
	devmode.dmFields = DM_DISPLAYORIENTATION; 
	ChangeDisplaySettingsEx(NULL, &devmode, 0, CDS_TEST, NULL); 

	switch(devmode.dmDisplayOrientation)
	{
	case DMDO_0:
		devmode.dmDisplayOrientation = DMDO_90; //???? 
		Rotation = 90;
		break;
	case DMDO_90:
		devmode.dmDisplayOrientation = DMDO_180;
		Rotation = 180;
		break;
	case DMDO_180:
		devmode.dmDisplayOrientation = DMDO_270;
		Rotation = 270;
		break;
	case DMDO_270:
		devmode.dmDisplayOrientation = DMDO_0;
		Rotation = 0;
		break;
	default :
		devmode.dmDisplayOrientation = DMDO_0;
		Rotation = 0;
	}

	devmode.dmFields = DM_DISPLAYORIENTATION; 
	ChangeDisplaySettingsEx(NULL, &devmode, NULL, 0, NULL); 

	status = RegOpenKeyEx(HKEY_LOCAL_MACHINE,
				TEXT("System\\GDI\\Rotation"),
				0, 0, &hRegKey);

	if (ERROR_SUCCESS == status)
	{
		ValLen = sizeof(DWORD);
		if (ERROR_SUCCESS == RegSetValueEx (hRegKey, TEXT("Angle"), NULL, REG_DWORD, (PBYTE)&Rotation, ValLen)) 
		RegCloseKey(hRegKey);
	}
	RegFlushKey(HKEY_LOCAL_MACHINE);

}