透明窗体

矫情吗；* 2021-09-22 08:48 439阅读 0赞

透明窗体：

主要代码：

// TestDlg.cpp : implementation file
    //
    
    #include "stdafx.h"
    #include "Test.h"
    #include "TestDlg.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()
    
    /
    // CTestDlg dialog
    
    CTestDlg::CTestDlg(CWnd* pParent /*=NULL*/)
    	: CDialog(CTestDlg::IDD, pParent)
    {
    	//{
       {AFX_DATA_INIT(CTestDlg)
    		// 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 CTestDlg::DoDataExchange(CDataExchange* pDX)
    {
    	CDialog::DoDataExchange(pDX);
    	//{
       {AFX_DATA_MAP(CTestDlg)
    		// NOTE: the ClassWizard will add DDX and DDV calls here
    	//}}AFX_DATA_MAP
    }
    
    BEGIN_MESSAGE_MAP(CTestDlg, CDialog)
    	//{
       {AFX_MSG_MAP(CTestDlg)
    	ON_WM_SYSCOMMAND()
    	ON_WM_PAINT()
    	ON_WM_QUERYDRAGICON()
    	ON_WM_MOVE()
    	ON_WM_CREATE()
    	//}}AFX_MSG_MAP
    END_MESSAGE_MAP()
    
    /
    // CTestDlg message handlers
    
    BOOL CTestDlg::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
    	//初始化GDI+.
    	m_Blend.BlendOp=0; //theonlyBlendOpdefinedinWindows2000
    	m_Blend.BlendFlags=0; //nothingelseisspecial...
    	m_Blend.AlphaFormat=1; //...
    	m_Blend.SourceConstantAlpha=255;//AC_SRC_ALPHA
    
    	//窗体样式为0x80000为层级窗体
    	DWORD dwExStyle=GetWindowLong(m_hWnd,GWL_EXSTYLE);
    	SetWindowLong(m_hWnd,GWL_EXSTYLE,dwExStyle^0x80000);
    	
    	//绘制内存位图
    	HDC hdcTemp=GetDC()->m_hDC;
    	m_hdcMemory=CreateCompatibleDC(hdcTemp);
    	HBITMAP hBitMap=CreateCompatibleBitmap(hdcTemp,500,500);
    	SelectObject(m_hdcMemory,hBitMap);
    	
    	//使用GDI+载入PNG图片
    	HDC hdcScreen=::GetDC (m_hWnd);
    	RECT rct;
    	GetWindowRect(&rct);
    	POINT ptWinPos={rct.left,rct.top};
    	Graphics graph(m_hdcMemory);			//GDI+中的类
    	Image image(L"bk.png",TRUE);			//GDI+中的类
    	graph.DrawImage(&image,0,0,267,154);	//后面两个参数要设置成跟图片一样大小，否则会失真
    
    	//使用UpdateLayerWindow进行窗口透明处理
    	HMODULE hFuncInst=LoadLibrary("User32.DLL");
    	typedef BOOL (WINAPI *MYFUNC)(HWND,HDC,POINT*,SIZE*,HDC,POINT*,COLORREF,BLENDFUNCTION*,DWORD);          
    	MYFUNC UpdateLayeredWindow;
    	UpdateLayeredWindow=(MYFUNC)GetProcAddress(hFuncInst,"UpdateLayeredWindow");
    	SIZE sizeWindow={267,154};
    	POINT ptSrc={0,0};
    	UpdateLayeredWindow( m_hWnd,hdcScreen,&ptWinPos,&sizeWindow,m_hdcMemory,&ptSrc,0,&m_Blend,2);
    
    	return TRUE;  // return TRUE  unless you set the focus to a control
    }
    
    void CTestDlg::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 CTestDlg::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 CTestDlg::OnQueryDragIcon()
    {
    	return (HCURSOR) m_hIcon;
    }
    
    void CTestDlg::OnMove(int x, int y) 
    {
    	CDialog::OnMove(x, y);
    	// TODO: Add your message handler code here
    	CRect rcWindow;                  // 使用MoveWindow函数的示例
    	GetWindowRect(rcWindow);
    	rcWindow.bottom-=10;
    	rcWindow.left+=10;
    	rcWindow.right-=10;
    	rcWindow.top+=20;
    	pChildWnd->MoveWindow(&rcWindow);
    }
    
    int CTestDlg::OnCreate(LPCREATESTRUCT lpCreateStruct) 
    {
    	if (CDialog::OnCreate(lpCreateStruct) == -1)
    		return -1;
    	
    	// TODO: Add your specialized creation code here
    	//创建子窗体
    	pChildWnd=new COnWindow(this);
    	pChildWnd->Create(IDD_ONWINDOW_DIALOG);
    	pChildWnd->ShowWindow(SW_SHOW);
    
    	return 0;
    }

效果图：

![20171009205006108][]

程序和源代码链接：

[http://download.csdn.net/download/zhangxiaoyu\_sy/9961970][http_download.csdn.net_download_zhangxiaoyu_sy_9961970]

[20171009205006108]: /images/20210920/ab02b3d56768449d85a7de3b6ee76574.png
[http_download.csdn.net_download_zhangxiaoyu_sy_9961970]: http://download.csdn.net/download/zhangxiaoyu_sy/9961970