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How to use GetWindowDC method of FlaUI.Core.WindowsAPI.User32 class

Best FlaUI code snippet using FlaUI.Core.WindowsAPI.User32.GetWindowDC

Capture.cs

Source:Capture.cs

...92        private static Bitmap CaptureDesktopToBitmap(int width, int height, Action<IntPtr, IntPtr> action)93        {94            // Use P/Invoke because of: https://stackoverflow.com/a/3072580/106920095            var hDesk = User32.GetDesktopWindow();96            var hSrc = User32.GetWindowDC(hDesk);97            var hDest = Gdi32.CreateCompatibleDC(hSrc);98            var hBmp = Gdi32.CreateCompatibleBitmap(hSrc, width, height);99            var hPrevBmp = Gdi32.SelectObject(hDest, hBmp);100            action(hDest, hSrc);101            var bmp = Image.FromHbitmap(hBmp);102            Gdi32.SelectObject(hDest, hPrevBmp);103            Gdi32.DeleteObject(hBmp);104            Gdi32.DeleteDC(hDest);105            User32.ReleaseDC(hDesk, hSrc);106            return bmp;107        }108    }109}...

GetWindowDC

Using AI Code Generation

1using System;2using System.Drawing;3using System.Windows.Forms;4using FlaUI.Core.WindowsAPI;5{6    {7        public Form1()8        {9            InitializeComponent();10        }11        private void Form1_Load(object sender, EventArgs e)12        {13        }14        private void Form1_MouseMove(object sender, MouseEventArgs e)15        {16            var hdc = User32.GetWindowDC(IntPtr.Zero);17            var color = Gdi32.GetPixel(hdc, e.X, e.Y);18            var colorString = string.Format("{0} - {1} - {2}", color.R, color.G, color.B);19            this.Text = colorString;20        }21    }22}23using System;24using System.Drawing;25using System.Windows.Forms;26using FlaUI.Core.WindowsAPI;27{28    {29        public Form1()30        {31            InitializeComponent();32        }33        private void Form1_Load(object sender, EventArgs e)34        {35        }36        private void Form1_MouseMove(object sender, MouseEventArgs e)37        {38            var hdc = User32.GetWindowDC(IntPtr.Zero);39            var color = Gdi32.GetPixel(hdc, e.X, e.Y);40            var colorString = string.Format("{0} - {1} - {2}", color.R, color.G, color.B);41            this.Text = colorString;42        }43    }44}45using System;46using System.Drawing;47using System.Windows.Forms;48using FlaUI.Core.WindowsAPI;49{50    {51        public Form1()

GetWindowDC

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6using FlaUI.Core.WindowsAPI;7using System.Runtime.InteropServices;8{9    {10        static void Main(string[] args)11        {12            IntPtr hWnd = User32.FindWindow(null, "Untitled - Notepad");13            IntPtr hDC = User32.GetWindowDC(hWnd);14            Console.WriteLine("hDC value is " + hDC);15            Console.ReadLine();16        }17    }18}19[DllImport("user32.dll", SetLastError = true)]20public static extern IntPtr GetDC(IntPtr hWnd);21using System;22using System.Collections.Generic;23using System.Linq;24using System.Text;25using System.Threading.Tasks;26using FlaUI.Core.WindowsAPI;27using System.Runtime.InteropServices;28{29    {30        static void Main(string[] args)31        {32            IntPtr hWnd = User32.FindWindow(null, "Untitled - Notepad");33            IntPtr hDC = User32.GetDC(hWnd);34            Console.WriteLine("hDC value is " + hDC);35            Console.ReadLine();36        }37    }38}39GetDCEx function retrieves a handle to a device context (DC) for the client area of a specified window or for the entire screen. You can use the returned handle in subsequent GDI functions to draw in

GetWindowDC

Using AI Code Generation

1using FlaUI.Core.WindowsAPI;2using System;3using System.Drawing;4using System.Runtime.InteropServices;5using System.Windows.Forms;6{7    {8        public Form1()9        {10            InitializeComponent();11        }12        private void button1_Click(object sender, EventArgs e)13        {14            IntPtr hWnd = User32.GetDesktopWindow();15            IntPtr hDC = User32.GetWindowDC(hWnd);16            Graphics g = Graphics.FromHdc(hDC);17            g.DrawRectangle(new Pen(Color.Red), 0, 0, 100, 100);18            g.Flush();19            g.Dispose();20        }21    }22}

GetWindowDC

Using AI Code Generation

1using System;2using System.Drawing;3using System.Runtime.InteropServices;4using System.Windows.Forms;5{6    {7        [DllImport("user32.dll", EntryPoint = "GetWindowDC")]8        public static extern IntPtr GetWindowDC(IntPtr hWnd);9    }10}11using System;12using System.Drawing;13using System.Runtime.InteropServices;14using System.Windows.Forms;15{16    {17        [DllImport("user32.dll", EntryPoint = "GetDC")]18        public static extern IntPtr GetDC(IntPtr hWnd);19    }20}21using System;22using System.Drawing;23using System.Runtime.InteropServices;24using System.Windows.Forms;25{26    {27        [DllImport("user32.dll", EntryPoint = "ReleaseDC")]28        public static extern int ReleaseDC(IntPtr hWnd, IntPtr hDC);29    }30}31using System;32using System.Drawing;33using System.Runtime.InteropServices;34using System.Windows.Forms;35{36    {37        [DllImport("user32.dll", EntryPoint = "GetClientRect")]38        public static extern bool GetClientRect(IntPtr hWnd, out RECT lpRect);39    }40}41using System;42using System.Drawing;43using System.Runtime.InteropServices;44using System.Windows.Forms;45{46    {47        [DllImport("user32.dll", EntryPoint = "PrintWindow")]48        public static extern bool PrintWindow(IntPtr hWnd, IntPtr hDC, int nFlags);49    }50}51using System;52using System.Drawing;53using System.Runtime.InteropServices;54using System.Windows.Forms;55{56    {57        [DllImport("gdi32.dll", EntryPoint = "BitBlt")]

GetWindowDC

Using AI Code Generation

1using FlaUI.Core.WindowsAPI;2using System;3using System.Drawing;4using System.Drawing.Imaging;5using System.Runtime.InteropServices;6using System.Windows.Forms;7{8    {9        public Form1()10        {11            InitializeComponent();12        }13        private void button1_Click(object sender, EventArgs e)14        {15            IntPtr hDC = User32.GetWindowDC(IntPtr.Zero);16            Graphics g = Graphics.FromHdc(hDC);17            Bitmap bmp = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height, g);18            Graphics mg = Graphics.FromImage(bmp);19            mg.CopyFromScreen(0, 0, 0, 0, bmp.Size);20            bmp.Save(@"C:\Users\Public\Documents\test1.jpg", ImageFormat.Jpeg);21            MessageBox.Show("Screenshot saved to C:\\Users\\Public\\Documents\\test1.jpg");22        }23    }24}25Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "5", "5.csproj", "{B9B3F6D0-6B3D-4B5E-A1C2-9A8C5D5A5E7A}"26	GlobalSection(SolutionConfigurationPlatforms) = preSolution27	GlobalSection(ProjectConfigurationPlatforms) = postSolution28		{B9B3F

GetWindowDC

Using AI Code Generation

1using FlaUI.Core.WindowsAPI;2using System;3using System.Runtime.InteropServices;4{5    {6        static void Main(string[] args)7        {8            IntPtr hwnd = User32.GetForegroundWindow();9            IntPtr hdc = User32.GetWindowDC(hwnd);10            User32.ReleaseDC(hwnd, hdc);11        }12    }13}14using FlaUI.Core.WindowsAPI;15using System;16using System.Runtime.InteropServices;17{18    {19        static void Main(string[] args)20        {21            IntPtr hwnd = User32.FindWindow(null, "Untitled - Notepad");22            IntPtr hdc = User32.GetWindowDC(hwnd);23            User32.ReleaseDC(hwnd, hdc);24        }25    }26}27using FlaUI.Core.WindowsAPI;28using System;29using System.Runtime.InteropServices;30{31    {32        static void Main(string[] args)33        {34            IntPtr hwnd = User32.FindWindow(null, "Untitled - Notepad");35            IntPtr hwndChild = User32.FindWindowEx(hwnd, IntPtr.Zero, "Edit", null);36            IntPtr hdc = User32.GetWindowDC(hwndChild);37            User32.ReleaseDC(hwndChild, hdc);38        }39    }40}41using FlaUI.Core.WindowsAPI;42using System;43using System.Runtime.InteropServices;

GetWindowDC

Using AI Code Generation

1using FlaUI.Core.WindowsAPI;2using System;3using System.Runtime.InteropServices;4{5    {6        static void Main(string[] args)7        {8            IntPtr handle = User32.FindWindow(null, "Untitled - Notepad");9            IntPtr deviceContext = User32.GetWindowDC(handle);10            User32.Rectangle(deviceContext, 10, 10, 100, 100);11            Console.Read();12        }13    }14}15using FlaUI.Core.WindowsAPI;16using System;17using System.Runtime.InteropServices;18{19    {20        static void Main(string[] args)21        {22            IntPtr handle = User32.FindWindow(null, "Untitled - Notepad");23            IntPtr deviceContext = User32.GetWindowDC(handle);24            Gdi32.DrawRectangle(deviceContext, 10, 10, 100, 100);25            Console.Read();26        }27    }28}29using FlaUI.Core.WindowsAPI;30using System;31using System.Runtime.InteropServices;32{33    {34        static void Main(string[] args)35        {36            IntPtr handle = User32.FindWindow(null, "Untitled - Notepad");37            IntPtr deviceContext = User32.GetWindowDC(handle);

GetWindowDC

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6using FlaUI.Core.WindowsAPI;7{8    {9        [DllImport("user32.dll")]10        public static extern IntPtr GetWindowDC(IntPtr hWnd);11    }12}13using System;14using System.Collections.Generic;15using System.Linq;16using System.Text;17using System.Threading.Tasks;18using FlaUI.Core.WindowsAPI;19{20    {21        [DllImport("user32.dll")]22        public static extern IntPtr GetDC(IntPtr hWnd);23    }24}25using System;26using System.Collections.Generic;27using System.Linq;28using System.Text;29using System.Threading.Tasks;30using FlaUI.Core.WindowsAPI;31{32    {33        [DllImport("user32.dll")]34        public static extern IntPtr GetDCEx(IntPtr hWnd, IntPtr hrgnClip, uint flags);35    }36}37using System;38using System.Collections.Generic;39using System.Linq;40using System.Text;41using System.Threading.Tasks;42using FlaUI.Core.WindowsAPI;43{44    {45        [DllImport("user32.dll")]46        public static extern IntPtr GetDesktopWindow();47    }48}49using System;50using System.Collections.Generic;51using System.Linq;52using System.Text;53using System.Threading.Tasks;54using FlaUI.Core.WindowsAPI;55{56    {57        [DllImport("user32.dll")]58        public static extern IntPtr GetForegroundWindow();59    }60}

GetWindowDC

Using AI Code Generation

1using FlaUI.Core.WindowsAPI;2using System;3using System.Runtime.InteropServices;4{5    {6        [DllImport("user32.dll", SetLastError = true)]7        static extern IntPtr GetWindow(IntPtr hWnd, uint uCmd);8        [DllImport("user32.dll", SetLastError = true)]9        static extern IntPtr GetWindowDC(IntPtr hWnd);10        [DllImport("user32.dll", SetLastError = true)]11        static extern IntPtr GetDC(IntPtr hWnd);12        static void Main(string[] args)13        {14            IntPtr hWnd = IntPtr.Zero;15            IntPtr hDC = IntPtr.Zero;16            hWnd = GetWindow(User32.GetDesktopWindow(), 5);17            if (hWnd != IntPtr.Zero)18            {19                hDC = GetWindowDC(hWnd);20                if (hDC == IntPtr.Zero)21                    hDC = GetDC(hWnd);22            }23            if (hDC != IntPtr.Zero)24                Console.WriteLine("Handle of the window: {0}", hDC);25                Console.WriteLine("Unable to get the handle of the window");26        }27    }28}

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