API声明类

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.Drawing;

namespace ZU14.CN.GetWindowHandleFromCursor
{
    /// <summary>
    /// API声明类
    /// </summary>
    internal static class NativeMethods
    {
        #region Windows API Import Section

        [DllImport("user32.dll", EntryPoint = "FindWindow", SetLastError = true, CharSet = CharSet.Unicode)]
        internal static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

        [DllImport("user32.dll", EntryPoint = "GetTopWindow", SetLastError = true, CharSet = CharSet.Unicode)]
        internal static extern IntPtr GetTopWindow(IntPtr hWnd);

        [DllImport("user32.dll", EntryPoint = "FindWindowEx", SetLastError = true, CharSet = CharSet.Unicode)]
        internal static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass,
            string lpszWindow);

        [DllImport("user32.dll", EntryPoint = "SetWindowPos", SetLastError = true)]
        [return: MarshalAs(UnmanagedType.Bool)]
        internal static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int X, int Y, int cx, int cy, uint uFlags);

        [DllImport("user32.dll", EntryPoint = "GetWindowTextLength", SetLastError = true,
            CharSet = CharSet.Unicode)]
        internal static extern int GetWindowTextLength(IntPtr hWnd);

        [DllImport("user32.dll", EntryPoint = "GetWindowText", CharSet = CharSet.Unicode, SetLastError = true)]
        internal static extern int GetWindowText(IntPtr hWnd, StringBuilder lpString, int nMaxCount);

        [DllImport("user32.dll", EntryPoint = "GetClassName", CharSet = CharSet.Unicode, SetLastError = true)]
        internal static extern int GetClassName(IntPtr hWnd, StringBuilder buf, int nMaxCount);

        [DllImport("user32.dll", EntryPoint = "SendMessage", SetLastError = true, CharSet = CharSet.Unicode)]
        internal static extern IntPtr SendMessage(IntPtr hWnd, uint wMsg, IntPtr wParam, string lParam);

        [DllImport("user32.dll", EntryPoint = "SendMessage", SetLastError = true, CharSet = CharSet.Auto)]
        internal static extern IntPtr SendMessage(IntPtr hWnd, uint wMsg, IntPtr wParam, IntPtr lParam);

        [DllImport("user32.dll", EntryPoint = "GetWindow", SetLastError = true)]
        internal static extern IntPtr GetWindow(IntPtr hWnd, uint wCmd);

        [DllImport("user32.dll", EntryPoint = "IsWindow", SetLastError = true)]
        [return: MarshalAs(UnmanagedType.Bool)]
        internal static extern bool IsWindow(IntPtr hWnd);

        [DllImport("user32.dll", SetLastError = true)]
        internal static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);
        [DllImport("user32.dll", SetLastError = true)]
        internal static extern int GetWindowLong(IntPtr hWnd, int nIndex);

        [DllImport("user32.dll", SetLastError = true)]
        internal static extern IntPtr GetSystemMenu(IntPtr hWnd, bool bRevert);
        [DllImport("user32.dll", SetLastError = true)]
        internal static extern bool RemoveMenu(IntPtr hMenu, uint uPosition, uint uFlags);
        [DllImport("user32.dll", SetLastError = true)]
        internal static extern bool DrawMenuBar(IntPtr hWnd);
        [DllImport("user32.dll", SetLastError = true)]
        internal static extern uint GetMenuItemCount(IntPtr hMenu);

        [DllImport("user32.dll", SetLastError = true)]
        internal static extern bool DeleteMenu(IntPtr hMenu, uint uPosition, uint uFlags);

        [DllImport("user32.dll")]
        internal static extern bool GetCursorPos(out Point lpPoint);

        [DllImport("user32.dll")]
        internal static extern IntPtr WindowFromPoint(Point Point);

        #endregion

        #region Windows Message Declaration Section
        internal const uint SWP_NOACTIVATE = 0x10;
        internal const uint SWP_SHOWWINDOW = 0x40;
        #endregion
    }
}