using System;
using System.Text;
using System.Drawing;
using System.Runtime.InteropServices;
using static WinAPI.Struct;
using System.Windows.Forms;

namespace WinAPI
{
    /// <summary>
    /// 
    /// </summary>
    public partial class User32
    {
        #region UnmanagedMethods
        /// <summary>
        /// 模拟鼠标点击
        /// </summary>
        /// <param name="dwFlags"></param>
        /// <param name="dx"></param>
        /// <param name="dy"></param>
        /// <param name="dwData"></param>
        /// <param name="dwExtraInfo"></param>
        /// <returns></returns>
        [DllImport("user32")]
        public static extern int mouse_event(int dwFlags, int dx, int dy, int dwData, int dwExtraInfo);
        /// <summary>
        /// 模拟按键
        /// </summary>
        /// <param name="bVk"></param>
        /// <param name="bScan"></param>
        /// <param name="dwFlags"></param>
        /// <param name="dwExtraInfo"></param>
        [DllImport("user32.dll", EntryPoint = "keybd_event", SetLastError = true)]
        public static extern void keybd_event(Keys bVk, byte bScan, uint dwFlags, uint dwExtraInfo);
        /// <summary>
        /// 
        /// </summary>
        /// <param name="hWnd"></param>
        /// <returns></returns>
        [DllImport("User32.dll", CharSet = CharSet.Auto)]
        public static extern IntPtr GetWindowDC(IntPtr hWnd);
        /// <summary>
        /// 移动窗口
        /// </summary>
        /// <param name="hWnd"></param>
        /// <param name="x"></param>
        /// <param name="y"></param>
        /// <param name="width"></param>
        /// <param name="height"></param>
        /// <param name="repaint"></param>
        /// <returns></returns>
        [DllImport("User32.dll", CharSet = CharSet.Auto)]
        public static extern bool MoveWindow(IntPtr hWnd, int x, int y, int width, int height, bool repaint);
        /// <summary>
        /// 
        /// </summary>
        /// <param name="lpPrevWndFunc"></param>
        /// <param name="hwnd"></param>
        /// <param name="msg"></param>
        /// <param name="wParam"></param>
        /// <param name="lParam"></param>
        /// <returns></returns>
        [DllImport("User32.dll")]
        public extern static IntPtr CallWindowProc(IntPtr lpPrevWndFunc, IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam);
        /// <summary>
        /// 
        /// </summary>
        /// <param name="hwnd"></param>
        /// <param name="nIndex"></param>
        /// <param name="dwNewLong"></param>
        /// <returns></returns>
        [DllImport("User32.dll")]
        public static extern IntPtr SetWindowLong(IntPtr hwnd, int nIndex, IntPtr dwNewLong);

        /// <summary>
        /// 
        /// </summary>
        /// <param name="hwndChild"></param>
        /// <param name="hwndParent"></param>
        /// <returns></returns>
        [DllImport("user32", CharSet = CharSet.Auto)]
        public static extern IntPtr SetParent(IntPtr hwndChild, IntPtr hwndParent);

        /// <summary>
        /// The GetParent function retrieves a handle to the specified window's parent or owner.
        /// </summary>
        /// <param name="hwnd">Handle to the window whose parent window handle is to be retrieved.</param>
        /// <returns>If the window is a child window, the return value is a handle to the parent window. If the window is a top-level window, the return value is a handle to the owner window. If the window is a top-level unowned window or if the function fails, the return value is NULL.</returns>
        [DllImport("user32", CharSet = CharSet.Auto)]
        public static extern IntPtr GetParent(IntPtr hwnd);
        /// <summary>
        /// 
        /// </summary>
        /// <param name="hwnd"></param>
        /// <param name="bRevert"></param>
        /// <returns></returns>
        [DllImport("USER32.DLL")]
        public static extern int GetSystemMenu(IntPtr hwnd, int bRevert);
        /// <summary>
        /// 
        /// </summary>
        /// <param name="hMenu"></param>
        /// <param name="nPosition"></param>
        /// <param name="wFlags"></param>
        /// <returns></returns>
        [DllImport("USER32.DLL")]
        public static extern int RemoveMenu(int hMenu, int nPosition, int wFlags);
        /// <summary>
        /// 
        /// </summary>
        /// <param name="hWnd"></param>
        /// <returns></returns>
        [DllImport("user32.dll")]
        public static extern bool SetForegroundWindow(IntPtr hWnd);
        /// <summary>
        /// 获取当前前台窗口句柄
        /// </summary>
        /// <returns></returns>
        [DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling = true)]
        public static extern IntPtr GetForegroundWindow();
        /// <summary>
        /// 获得当前活动窗体
        /// </summary>
        /// <returns></returns>
        [DllImport("user32.dll")]
        public static extern IntPtr GetActiveWindow();//获得当前活动窗体
        /// <summary>
        /// 设置活动窗体
        /// </summary>
        /// <param name="hwnd"></param>
        /// <returns></returns>
        [DllImport("user32.dll")]
        public static extern IntPtr SetActiveWindow(IntPtr hwnd);//设置活动窗体
        /// <summary>
        /// 获取类名
        /// </summary>
        /// <param name="hWnd"></param>
        /// <param name="lpClassName"></param>
        /// <param name="nMaxCount"></param>
        /// <returns></returns>
        [DllImport("user32", EntryPoint = "GetClassName", SetLastError = false,
            CharSet = CharSet.Auto, ExactSpelling = false,
            CallingConvention = CallingConvention.StdCall)]
        public static extern int GetClassName(int hWnd, StringBuilder lpClassName, int nMaxCount);
        /// <summary>
        /// 获取当前线程对应的进程ID
        /// </summary>
        /// <param name="hwnd"></param>
        /// <param name="ID"></param>
        /// <returns></returns>
        [DllImport("User32.dll", CharSet = CharSet.Auto)]
        public static extern int GetWindowThreadProcessId(IntPtr hwnd, out int ID);
        /// <summary>
        /// 判断指定句柄是否是一个窗口
        /// </summary>
        /// <param name="hWnd"></param>
        /// <returns></returns>
        [DllImport("user32.dll", EntryPoint = "IsWindow")]
        public static extern bool IsWindow(IntPtr hWnd);
        /// <summary>
        /// 获取窗口标题
        /// </summary>
        /// <param name="hWnd"></param>
        /// <param name="lpString"></param>
        /// <param name="nMaxCount"></param>
        /// <returns></returns>
        [DllImport("user32", SetLastError = true)]
        public static extern int GetWindowText(
            int hWnd,//窗口句柄
            StringBuilder lpString,//标题
            int nMaxCount //最大值
            );
        /// <summary>
        /// 
        /// </summary>
        /// <param name="hwnd"></param>
        /// <param name="wMsg"></param>
        /// <param name="wParam"></param>
        /// <param name="lParam"></param>
        /// <returns></returns>
        [DllImport("user32", CharSet = CharSet.Auto)]
        public static extern int SendMessage(
            IntPtr hwnd,
            int wMsg,
            int wParam,
            int lParam);
        /// <summary>
        /// 
        /// </summary>
        /// <param name="hwnd"></param>
        /// <param name="wMsg"></param>
        /// <param name="wParam"></param>
        /// <param name="lParam"></param>
        /// <returns></returns>
        [DllImport("user32", CharSet = CharSet.Auto)]
        public static extern int SendMessage(
            IntPtr hwnd,
            int wMsg,
            IntPtr wParam,
            IntPtr lParam);
        /// <summary>
        /// 
        /// </summary>
        /// <param name="hWnd"></param>
        /// <param name="Msg"></param>
        /// <param name="wParam"></param>
        /// <param name="lParam"></param>
        /// <returns></returns>
        [DllImport("user32.dll", SetLastError = true)]
        public static extern bool SendMessage(IntPtr hWnd, uint Msg, int wParam, int lParam);
        /// <summary>
        /// 发送消息
        /// </summary>
        /// <param name="hwnd"></param>
        /// <param name="msg"></param>
        /// <param name="wParam"></param>
        /// <param name="IParam"></param>
        /// <returns></returns>
        [DllImport("User32.dll", EntryPoint = "SendMessage")]
        public static extern int SendMessage(IntPtr hwnd, int msg, int wParam, ref COPYDATASTRUCT IParam);
        /// <summary>
        /// 发送消息
        /// </summary>
        /// <param name="hWnd"></param>
        /// <param name="msg"></param>
        /// <param name="wParam"></param>
        /// <param name="IParam"></param>
        [DllImport("user32.dll")]
        public static extern void PostMessage(IntPtr hWnd, int msg, int wParam, ref COPYDATASTRUCT IParam);
        /// <summary>
        /// 
        /// </summary>
        /// <param name="filename"></param>
        /// <returns></returns>
        [DllImport("user32", CharSet = CharSet.Auto)]
        public static extern IntPtr LoadCursorFromFile(string filename);
        /// <summary>
        /// 
        /// </summary>
        /// <param name="hwnd"></param>
        /// <returns></returns>
        [DllImport("user32", CharSet = CharSet.Auto)]
        public static extern bool IsWindowVisible(IntPtr hwnd);
        /// <summary>
        /// 查找窗口
        /// </summary>
        /// <param name="lpClassName"></param>
        /// <param name="lpWindowName"></param>
        /// <returns></returns>
        [DllImport("User32.dll", EntryPoint = "FindWindow")]
        public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
        /// <summary>
        /// The FindWindowEx function retrieves a handle to a window whose class name and window name match the specified strings. The function searches child windows, beginning with the one following the specified child window.
        /// </summary>
        /// <param name="hwndParent">Handle to the parent window whose child windows are to be searched.</param>
        /// <param name="hwndChildAfter">Handle to a child window.</param>
        /// <param name="lpszClass">Specifies class name.</param>
        /// <param name="lpszWindow">Pointer to a null-terminated string that specifies the window name (the window's title).</param>
        /// <returns>If the function succeeds, the return value is a handle to the window that has the specified class and window names.If the function fails, the return value is NULL.</returns>
        [DllImport("user32", CharSet = CharSet.Auto)]
        public static extern IntPtr FindWindowEx(
            IntPtr hwndParent,
            IntPtr hwndChildAfter,
            [MarshalAs(UnmanagedType.LPTStr)]
			string lpszClass,
            [MarshalAs(UnmanagedType.LPTStr)]
			string lpszWindow);

        /// <summary>
        /// The InvalidateRect function adds a rectangle to the specified window's update region.
        /// </summary>
        /// <param name="hwnd">Handle to window.</param>
        /// <param name="rect">Rectangle coordinates.</param>
        /// <param name="bErase">Erase state.</param>
        /// <returns>If the function succeeds, the return value is true.If the function fails, the return value is false.</returns>
        [DllImport("user32", CharSet = CharSet.Auto)]
        public static extern bool InvalidateRect(
            IntPtr hwnd,
            ref Rectangle rect,
            bool bErase);

        /// <summary>
        /// The ValidateRect function validates the client area within a rectangle by removing the rectangle from the update region of the specified window.
        /// </summary>
        /// <param name="hwnd">Handle to window.</param>
        /// <param name="rect">Validation rectangle coordinates.</param>
        /// <returns>If the function succeeds, the return value is true.If the function fails, the return value is false.</returns>
        [DllImport("user32", CharSet = CharSet.Auto)]
        public static extern bool ValidateRect(
            IntPtr hwnd,
            ref Rectangle rect);
        /// <summary>
        /// 
        /// </summary>
        /// <param name="hWnd"></param>
        /// <param name="dwStyle"></param>
        /// <returns></returns>
        [DllImport("user32", CharSet = CharSet.Auto)]
        public static extern int GetWindowLong(
            IntPtr hWnd,
            int dwStyle);
        /// <summary>
        /// 
        /// </summary>
        /// <param name="hwnd"></param>
        /// <returns></returns>
        [DllImport("user32", CharSet = CharSet.Auto)]
        public static extern IntPtr GetDC(
            IntPtr hwnd);
        /// <summary>
        /// 
        /// </summary>
        /// <param name="hwnd"></param>
        /// <param name="hdc"></param>
        /// <returns></returns>
        [DllImport("user32", CharSet = CharSet.Auto)]
        public static extern int ReleaseDC(
            IntPtr hwnd,
            IntPtr hdc);
        
        //[DllImport("user32", SetLastError = false)]
        //internal static extern IntPtr GetDesktopWindow();

        //[DllImport("user32", CharSet = CharSet.Auto)]
        //internal static extern int GetScrollPos(
        //    IntPtr hwnd,
        //    int nBar);
        /// <summary>
        /// 
        /// </summary>
        /// <param name="hwnd"></param>
        /// <param name="rect"></param>
        /// <returns></returns>
        [DllImport("user32", CharSet = CharSet.Auto)]
        public static extern int GetClientRect(
            IntPtr hwnd,
            [In, Out] ref Rectangle rect);
        /// <summary>
        /// 
        /// </summary>
        /// <param name="hWnd"></param>
        /// <param name="rect"></param>
        /// <returns></returns>
        [DllImport("user32", CharSet = CharSet.Auto)]
        public static extern bool GetWindowRect(
            IntPtr hWnd,
            out Rectangle rect);
        /// <summary>
        /// 
        /// </summary>
        /// <param name="hwnd"></param>
        /// <param name="hdcDst"></param>
        /// <param name="pptDst"></param>
        /// <param name="psize"></param>
        /// <param name="hdcSrc"></param>
        /// <param name="pprSrc"></param>
        /// <param name="crKey"></param>
        /// <param name="pblend"></param>
        /// <param name="dwFlags"></param>
        /// <returns></returns>
        [DllImport("user32", ExactSpelling = true, SetLastError = true)]
        public static extern bool UpdateLayeredWindow(IntPtr hwnd, IntPtr hdcDst, ref Point pptDst, ref Size psize, IntPtr hdcSrc, ref Point pprSrc, Int32 crKey, ref BLENDFUNCTION pblend, Int32 dwFlags);
        /// <summary>
        /// 
        /// </summary>
        /// <param name="hWnd"></param>
        /// <param name="nIndex"></param>
        /// <param name="dwNewLong"></param>
        /// <returns></returns>
        [DllImport("user32", CharSet = CharSet.Auto)]
        public static extern uint SetWindowLong(
            IntPtr hWnd,
            int nIndex,
            int dwNewLong);

        /// <summary>
        /// Changes the size, position, and Z order of a child, pop-up, or top-level window.
        /// These windows are ordered according to their appearance on the screen.
        /// The topmost window receives the highest rank and is the first window in the Z order.
        /// </summary>
        /// <param name="hWnd">A handle to the window.</param>
        /// <param name="hWndAfter">A handle to the window to precede the positioned window in the Z order. This parameter must be a window handle or one of the following values.</param>       
        /// <param name="X">Specifies the new position of the left side of the window, in client coordinates.</param>
        /// <param name="Y">Specifies the new position of the top of the window, in client coordinates.</param>
        /// <param name="Width">Specifies the new width of the window, in pixels.</param>
        /// <param name="Height">Specifies the new height of the window, in pixels.</param>
        /// <param name="flags">Specifies the window sizing and positioning flags. This parameter can be a combination of the following values.</param>
        /// <returns>If the function succeeds, the return value is nonzero, if the function fails, the return value is zero.</returns>
        [DllImport("user32", CharSet = CharSet.Auto)]
        public static extern int SetWindowPos(
            IntPtr hWnd,
            IntPtr hWndAfter,
            int X,
            int Y,
            int Width,
            int Height,
            FlagsSetWindowPos flags);
        /// <summary>
        /// 
        /// </summary>
        /// <param name="hWnd"></param>
        /// <param name="hWndInsertAfter"></param>
        /// <param name="X"></param>
        /// <param name="Y"></param>
        /// <param name="cx"></param>
        /// <param name="cy"></param>
        /// <param name="uFlags"></param>
        /// <returns></returns>
        [DllImport("user32", CharSet = CharSet.Auto)]
        public static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int X,
           int Y, int cx, int cy, uint uFlags);

        #endregion
    }
}