backlight1dlg.cpp

调节背光亮度的程序和代码 Pocket PC上面

// Backlight1Dlg.cpp : implementation file
//

#include "stdafx.h"
#include "Backlight1.h"
#include "Backlight1Dlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CBacklight1Dlg dialog

CBacklight1Dlg::CBacklight1Dlg(CWnd* pParent /*=NULL*/)
	: CDialog(CBacklight1Dlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CBacklight1Dlg)
		// 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 CBacklight1Dlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CBacklight1Dlg)
	DDX_Control(pDX, IDC_SLIDER1, m_ctrlSlider1);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CBacklight1Dlg, CDialog)
	//{{AFX_MSG_MAP(CBacklight1Dlg)
	ON_BN_CLICKED(IDC_SET, OnSet)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CBacklight1Dlg message handlers

BOOL CBacklight1Dlg::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
	m_ctrlSlider1.SetRange(0,10);
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}



void CBacklight1Dlg::OnSet() 
{
	int Lumin=m_ctrlSlider1.GetPos();

	HKEY hKey; 
	DWORD dwType=0; 
	DWORD dwState=Lumin;

	if(ERROR_SUCCESS==RegOpenKeyEx(HKEY_CURRENT_USER, TEXT("ControlPanel\\Backlight"),0,0,&hKey)) 
	{
		RegSetValueEx(hKey, TEXT("BacklightLuminanceLevel"),0,REG_DWORD,(BYTE*)&dwState,sizeof(DWORD));
		RegCloseKey(hKey); 
	}

	HANDLE hBL=CreateEvent(NULL,FALSE,FALSE,L"BackLightChangeEvent");
	if(hBL) 
	{
		SetEvent(hBL);
		CloseHandle(hBL);
	}
}