WPF Custom Borderless Form Resize implementation

Parameter definition

1         classNativeMethods2         {3              Public Const intWm_nchittest =0x84;4              Public Const intHtcaption =2;5              Public Const intHtleft =Ten;6              Public Const intHtright = One;7              Public Const intHttop = A;8              Public Const intHttopleft = -;9              Public Const intHttopright = -;Ten              Public Const intHtbottom = the; One              Public Const intHtbottomleft = -; A              Public Const intHtbottomright = -; -}

Add Hook

1 New Windowinterophelper (Win). Handle; 2  HwndSource Windowsource = Hwndsource.fromhwnd (windowhandle); 3 Windowsource.removehook (WndProc);   

1  Private StaticINTPTR WndProc (INTPTR hwnd,intMSG, IntPtr WParam, IntPtr LParam,ref BOOLhandled)2         {3             intGripsize = -;4             intBordersize =7;5Window win =(Window) System.Windows.Interop.HwndSource.FromHwnd (HWND). rootvisual;6             if(msg = =nativemethods.wm_nchittest)7             {8                 intx = Lparam.toint32 () << ->> -, y = Lparam.toint32 () >> -;9Point pos = win. Pointfromscreen (NewPoint (x, y));Ten  One                 //Bottom A                 if(Pos. X > Gripsize && -Pos. X < win. Actualwidth-gripsize && -Pos. Y >= win. ActualHeight-bordersize) the                 { -handled =true; -                     return(INTPTR) nativemethods.htbottom; -                 } +  -                 // Right +                 if(Pos. Y > Gripsize && APos. X > win. Actualwidth-bordersize && atPos. Y < win. ActualHeight-gripsize) -                 { -handled =true; -                     return(INTPTR) nativemethods.htright; -                 } -  in                 //Top, left, right, corners, ETC. -                 //Htbottomright to                 if(Pos. X > win. Actualwidth-gripsize && +Pos. Y >= win. ActualHeight-gripsize) -                 { thehandled =true; *                     return(INTPTR) nativemethods.htbottomright; $                 }Panax Notoginseng             } -  the             returnIntPtr.Zero; +}

WPF Custom Borderless Form Resize implementation