WPF&MFC&Opencv透明全屏无边框窗口创建

WPF窗口：

MainWindow.xaml中修改代码如下：

Title="MainWindow" Height="1080" Width="1920" WindowStyle="None" 
Background="{x:Null}" AllowsTransparency="True"  
Topmost ="True" > 

MainWindow.xaml.cs中修改如下： 

public partial class MainWindow : Window
 {
 public MainWindow()
 {
 InitializeComponent();
 #region 设置全屏 
this.WindowState = System.Windows.WindowState.Normal;
 this.WindowStyle = System.Windows.WindowStyle.None;
 this.ResizeMode = System.Windows.ResizeMode.NoResize;
 this.Topmost = true;
 this.Left = 0.0;
 this.Top = 0.0;
 this.Width = System.Windows.SystemParameters.PrimaryScreenWidth;
 this.Height = System.Windows.SystemParameters.PrimaryScreenHeight;
 #endregion
 } 
private void Grid_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
 { } 
//Esc for close 
private void Window_KeyDown(object sender, System.Windows.Input.KeyEventArgs e)
 {
 if (e.Key == Key.Escape)
 { this.Close(); }
 }
 }

MFC窗口：

透明全屏隐藏任务栏图标：在修改OnInitDialog如下 

BOOL xxxDlg::OnInitDialog()
 {
 CDialog::OnInitDialog();
 // 将“关于...”菜单项添加到系统菜单中。
 // IDM_ABOUTBOX 必须在系统命令范围内。
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
 ASSERT(IDM_ABOUTBOX < 0xF000);
 CMenu* pSysMenu = GetSystemMenu(FALSE);
 if (pSysMenu != NULL)
 {
 BOOL bNameValid;
 CString strAboutMenu;
 bNameValid = strAboutMenu.LoadString(IDS_ABOUTBOX);
 ASSERT(bNameValid);
 if (!strAboutMenu.IsEmpty())
 {
 pSysMenu->AppendMenu(MF_SEPARATOR);
 pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
 }
 } 
// 设置此对话框的图标。当应用程序主窗口不是对话框时，框架将自动 
// 执行此操作 
SetIcon(m_hIcon, TRUE);	 // 设置大图标
 SetIcon(m_hIcon, FALSE);	 // 设置小图标
 ModifyStyleEx(0,WS_EX_TOPMOST);
 ShowWindow(SW_SHOW);
 // TODO: 在此添加额外的初始化代码
 ModifyStyleEx(WS_EX_APPWINDOW,WS_EX_TOOLWINDOW);	//hide taskbar icon 
SendMessage(WM_SYSCOMMAND,SC_MAXIMIZE,0);	 //full screen 
HWND hWnd = this->GetSafeHwnd ();	 
::SetWindowPos(hWnd, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE);//topmost 
//SetWindowPos(&wndTopMost,0,0, GetSystemMetrics(SM_CXSCREEN),GetSystemMetrics(SM_CYSCREEN), // SWP_SHOWWINDOW | SWP_NOACTIVATE);	 //full screen 
//transparent windows 
SetWindowLong(this->GetSafeHwnd(),GWL_EXSTYLE, GetWindowLong(this->GetSafeHwnd(),GWL_EXSTYLE)^WS_EX_LAYERED);
 HINSTANCE hInst = LoadLibrary(L"User32.DLL");//显式加载DLL 
if(hInst!=NULL)
 {
 typedef BOOL (WINAPI *MYFUNC)(HWND,COLORREF,BYTE,DWORD);
 MYFUNC pFun = NULL;
 pFun=(MYFUNC)GetProcAddress(hInst, "SetLayeredWindowAttributes");
//取得SetLayeredWindowAttributes函数指针 
if(pFun!=NULL) 
pFun(this->GetSafeHwnd(),0,150,LWA_ALPHA); FreeLibrary(hInst);
 }
 int cx=::GetSystemMetrics(SM_CXSCREEN);//get screen width 
int cy=::GetSystemMetrics(SM_CYSCREEN);//get screen hight 
return TRUE; // 除非将焦点设置到控件，否则返回 TRUE 
} 

无边框：添加OnCeate重写该方法如下 

int xxxDlg::OnCreate(LPCREATESTRUCT lpCreateStruct)
 {
 ModifyStyle(WS_CAPTION|WS_THICKFRAME, 0, SWP_DRAWFRAME);
 SetMenu(NULL);
 if (CDialog::OnCreate(lpCreateStruct) == -1)
 return -1;
 // TODO: 在此添加您专用的创建代码
 return 0;
 }

Opencv窗口：

cvNamedWindow( "Transform", 0 ); 
//置顶 
HWND hWnd = (HWND)cvGetWindowHandle("Transform"); 
HWND hRawWnd = ::GetParent(hWnd); 
if (hRawWnd != NULL)
 {
 BOOL bRet = ::SetWindowPos(hRawWnd, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE);
 assert(bRet);
 } 
hWnd = (HWND) 
cvGetWindowHandle("Transform");
 hWnd = GetParent(hWnd) ;
 // 透明视窗 
LONG style = GetWindowLong( hWnd, GWL_EXSTYLE);
 style = style | WS_EX_LAYERED; SetWindowLong( hWnd, GWL_EXSTYLE, style);
 SetLayeredWindowAttributes(hWnd, RGB(255,255,255), 0, LWA_COLORKEY);
 // 无边框无标题，无效 
style = GetWindowLong(hWnd, GWL_STYLE);
 style = style & (~WS_CAPTION) & ~(WS_BORDER) & ~WS_THICKFRAME;
 SetWindowLong( hWnd, GWL_STYLE, style);

 哦了，窗口建立好了，重点还是在后面要做什么啊！参考了网上好多资料感觉这个最简单，帖出来分享下同时做个笔记~