using System;using System.Collections.Generic;using System.ComponentModel;using System.Diagnostics;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using System.Runtime.InteropServices;using HWND = System.IntPtr;namespace SetWindowPosition{ public partial class Form1 : Form { public Form1() { InitializeComponent(); preloadProcesses(); } // Define the FindWindow API function. [DllImport("user32.dll", EntryPoint = "FindWindow", SetLastError = true)] static extern IntPtr FindWindowByCaption(IntPtr ZeroOnly, string lpWindowName); // Define the SetWindowPos API function. [DllImport("user32.dll")] [return: MarshalAs(UnmanagedType.Bool)] static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int X, int Y, int cx, int cy, SetWindowPosFlags uFlags); [DllImport("USER32.DLL")] private static extern IntPtr GetShellWindow(); private delegate bool EnumWindowsProc(HWND hWnd, int lParam); [DllImport("USER32.DLL")] private static extern bool EnumWindows(EnumWindowsProc enumFunc, int lParam); [DllImport("USER32.DLL")] private static extern bool IsWindowVisible(HWND hWnd); [DllImport("USER32.DLL")] private static extern int GetWindowTextLength(HWND hWnd); [DllImport("USER32.DLL")] private static extern int GetWindowText(HWND hWnd, StringBuilder lpString, int nMaxCount); [DllImport("user32")] private static extern UInt32 GetWindowThreadProcessId(Int32 hWnd, out Int32 lpdwProcessId); public static Int32 GetWindowProcessID(Int32 hwnd) { Int32 pid = 1; GetWindowThreadProcessId(hwnd, out pid); return pid; } // Define the SetWindowPosFlags enumeration. [Flags()] private enum SetWindowPosFlags : uint { SynchronousWindowPosition = 0x4000, DeferErase = 0x2000, DrawFrame = 0x0020, FrameChanged = 0x0020, HideWindow = 0x0080, DoNotActivate = 0x0010, DoNotCopyBits = 0x0100, IgnoreMove = 0x0002, DoNotChangeOwnerZOrder = 0x0200, DoNotRedraw = 0x0008, DoNotReposition = 0x0200, DoNotSendChangingEvent = 0x0400, IgnoreResize = 0x0001, IgnoreZOrder = 0x0004, ShowWindow = 0x0040, } /// <summary>Returns a dictionary that contains the handle and title of all the open windows.</summary> /// <returns>A dictionary that contains the handle and title of all the open windows.</returns> public static HashSet<WindowInfo> GetOpenWindows() { HWND shellWindow = GetShellWindow(); HashSet<WindowInfo> windows = new HashSet<WindowInfo>(); EnumWindows(delegate (HWND hWnd, int lParam) { if (hWnd == shellWindow) return true; if (!IsWindowVisible(hWnd)) return true; int length = GetWindowTextLength(hWnd); if (length == 0) return true; StringBuilder builder = new StringBuilder(length); GetWindowText(hWnd, builder, length 1); Int32 pid = GetWindowProcessID(hWnd.ToInt32()); Process p = Process.GetProcessById(pid); string appName = p.ProcessName; WindowInfo window = new WindowInfo(hWnd, appName, builder.ToString()); windows.Add(window); return true; }, 0); return windows; } private void preloadProcesses() { HashSet<WindowInfo> allWindows = GetOpenWindows(); foreach (WindowInfo windowData in allWindows) { comboBox1.Items.Add(windowData); } } // Size and position the application. private void btnSet_Click(object sender, EventArgs e) { // Get the target window's handle. IntPtr target_hwnd = //FindWindowByCaption(IntPtr.Zero, txtAppTitle.Text); ((WindowInfo) comboBox1.SelectedItem).hWnd; if (target_hwnd == IntPtr.Zero) { MessageBox.Show( "Could not find a window with the title \"" ((WindowInfo) comboBox1.SelectedItem).title "\""); return; } // Set the window's position. int width = int.Parse(txtWidth.Text); int height = int.Parse(txtHeight.Text); int x = int.Parse(txtX.Text); int y = int.Parse(txtY.Text); SetWindowPos(target_hwnd, IntPtr.Zero, x, y, width, height, 0); } }}
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