c# DX游戏鼠标点击指定坐标 后台鼠标

在C#中，可以使用User32.dll库中的鼠标事件函数来模拟鼠标点击。

以下是示例代码：

using System;
using System.Runtime.InteropServices;

public class MouseSimulator
{
    [DllImport("user32.dll", SetLastError = true)]
    static extern uint SendInput(uint nInputs, INPUT[] pInputs, int cbSize);

    [StructLayout(LayoutKind.Sequential)]
    struct INPUT
    {
        public uint type;
        public InputUnion U;
        public static int Size
        {
            get { return Marshal.SizeOf(typeof(INPUT)); }
        }
    }

    [StructLayout(LayoutKind.Explicit)]
    struct InputUnion
    {
        [FieldOffset(0)]
        public MOUSEINPUT mi;
    }

    [StructLayout(LayoutKind.Sequential)]
    struct MOUSEINPUT
    {
        public int dx;
        public int dy;
        public uint mouseData;
        public uint dwFlags;
        public uint time;
        public IntPtr dwExtraInfo;
    }

    const uint MOUSEEVENTF_ABSOLUTE = 0x8000;
    const uint MOUSEEVENTF_LEFTDOWN = 0x0002;
    const uint MOUSEEVENTF_LEFTUP = 0x0004;
    const uint MOUSEEVENTF_MIDDLEDOWN = 0x0020;
    const uint MOUSEEVENTF_MIDDLEUP = 0x0040;
    const uint MOUSEEVENTF_MOVE = 0x0001;
    const uint MOUSEEVENTF_RIGHTDOWN = 0x0008;
    const uint MOUSEEVENTF_RIGHTUP = 0x0010;

    public static void Click(int x, int y)
    {
        var inputList = new INPUT[2];

        // Move to the specified coordinates
        inputList[0].type = inputList[1].type = 0;
        inputList[0].U.mi.dx = inputList[1].U.mi.dx = (int)(x * (65535.0f / Screen.PrimaryScreen.Bounds.Width));
        inputList[0].U.mi.dy = inputList[1].U.mi.dy = (int)(y * (65535.0f / Screen.PrimaryScreen.Bounds.Height));
        inputList[0].U.mi.mouseData = inputList[1].U.mi.mouseData = 0;
        inputList[0].U.mi.dwFlags = MOUSEEVENTF_ABSOLUTE | MOUSEEVENTF_MOVE;
        inputList[1].U.mi.dwFlags = MOUSEEVENTF_ABSOLUTE | MOUSEEVENTF_LEFTDOWN;

        SendInput(2, inputList, INPUT.Size);

        inputList[0].U.mi.dwFlags = MOUSEEVENTF_ABSOLUTE | MOUSEEVENTF_LEFTUP;
        inputList[1].U.mi.dwFlags = MOUSEEVENTF_ABSOLUTE | MOUSEEVENTF_MOVE;

        SendInput(2, inputList, INPUT.Size);
    }
}

这里的Click方法使用了SendInput函数模拟鼠标移动和点击事件。你可以在需要模拟鼠标点击的地方调用该方法，并传入需要点击的坐标值。例如：

MouseSimulator.Click(100, 100); // 模拟点击(100, 100)的位置