explamedlg.cpp

此程序可以实现的功能是 实现一个窗体的透明化,并可以手动设置透明度

// ExplameDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Explame.h"
#include "ExplameDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CExplameDlg dialog

CExplameDlg::CExplameDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CExplameDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CExplameDlg)
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CExplameDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CExplameDlg)
	DDX_Control(pDX, IDC_SLIDER1, m_sld);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CExplameDlg, CDialog)
	//{{AFX_MSG_MAP(CExplameDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_NOTIFY(NM_RELEASEDCAPTURE, IDC_SLIDER1, OnReleasedcaptureSlider1)
	ON_WM_HSCROLL()
	ON_WM_LBUTTONDOWN()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CExplameDlg message handlers

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

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// 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
	
	// TODO: Add extra initialization here
	SetWindowLong(this->GetSafeHwnd(),GWL_EXSTYLE,
   GetWindowLong(this->GetSafeHwnd(),GWL_EXSTYLE)^0x80000);
  HINSTANCE hInst = LoadLibrary("User32.DLL"); 
  if(hInst) 
  { 
	  typedef BOOL (WINAPI *MYFUNC)(HWND,COLORREF,BYTE,DWORD); 
	  
	  
	  MYFUNC fun = NULL;
  //取得SetLayeredWindowAttributes函数指针 
fun=(MYFUNC)GetProcAddress(hInst, "SetLayeredWindowAttributes");
if(fun)
fun(this->GetSafeHwnd(),0,128,2);
FreeLibrary(hInst); 
} 

	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CExplameDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CExplameDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CExplameDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CExplameDlg::OnReleasedcaptureSlider1(NMHDR* pNMHDR, LRESULT* pResult) 
{
	BYTE m=(BYTE)m_sld.GetPos();
	HINSTANCE hInst = LoadLibrary("User32.DLL"); 
	if(hInst) 
	{            
		typedef BOOL (WINAPI *MYFUNC)(HWND,COLORREF,BYTE,DWORD);          
		MYFUNC fun = NULL;
		
		fun=(MYFUNC)GetProcAddress(hInst, "SetLayeredWindowAttributes"); //取得SetLayeredWindowAttributes函数指针  
		if(fun)
			fun(AfxGetMainWnd()->GetSafeHwnd(),0,m,2);  
		
		FreeLibrary(hInst); 
	};	

	CString str;
	str.Format("窗体的透明度:%%%d",100 * m / 255);
	SetDlgItemText(IDC_STATE,str);		
	*pResult = 0;

	CString str2;
	str2.Format("%d",m);
	::WritePrivateProfileString("Settings","nTransparent",str2,".\\Settings.ini");
	
	*pResult = 0;	
	*pResult = 0;
}

void CExplameDlg::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar) 
{
BYTE m=(BYTE)m_sld.GetPos();
	HINSTANCE hInst = LoadLibrary("User32.DLL"); 
	if(hInst) 
	{            
		typedef BOOL (WINAPI *MYFUNC)(HWND,COLORREF,BYTE,DWORD);          
		MYFUNC fun = NULL;
		
		fun=(MYFUNC)GetProcAddress(hInst, "SetLayeredWindowAttributes"); //取得SetLayeredWindowAttributes函数指针  
		if(fun)
			fun(AfxGetMainWnd()->GetSafeHwnd(),0,m,2);  
		
		FreeLibrary(hInst); 
	};	

	CString str;
	str.Format("窗体的透明度:%%%d",100 * m / 255);
	SetDlgItemText(IDC_STATE,str);		

/*	CString str2;
	str2.Format("%d",m);
	::WritePrivateProfileString("闹钟设置","nTransparent",str2,".\\Settings.ini");
*/		
//	CPropertyPage::OnHScroll(nSBCode, nPos, pScrollBar);	
	CDialog::OnHScroll(nSBCode, nPos, pScrollBar);
}

void CExplameDlg::OnLButtonDown(UINT nFlags, CPoint point) 
{
	AfxGetMainWnd()->SendMessage(WM_NCLBUTTONDOWN,HTCAPTION,0);

	
	//CPropertyPage::OnLButtonDown(nFlags, point);
	
	CDialog::OnLButtonDown(nFlags, point);
}