Question

我想创建一个非常简单的程序，可以帮助我的亲戚看到鼠标指针使用特定对比色的大对象。因此我需要将对象仍然存在于所有正在运行的应用程序的顶部以及鼠标x，y上。我已经找到了一个从应用程序外部收到鼠标坐标的代码，但我不知道如何继续。谢谢！

编辑：这是鼠标挂钩代码，可以打印或只存储鼠标光标的X，Y.这就是我所拥有的 - 我不知道如何创建一个对象并将其显示在“所有其他应用程序之上”。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
using System.Diagnostics;
using System.Windows.Forms;
namespace WindowsFormsApplication1
{
    class Class1
    {
        class InterceptMouse
        {
            private static LowLevelMouseProc _proc = HookCallback;
            private static IntPtr _hookID = IntPtr.Zero;

            public static void Main()
            {
                _hookID = SetHook(_proc);
                Application.Run();
                UnhookWindowsHookEx(_hookID);
            }

            private static IntPtr SetHook(LowLevelMouseProc proc)
            {
                using (Process curProcess = Process.GetCurrentProcess())
                using (ProcessModule curModule = curProcess.MainModule)
                {
                    return SetWindowsHookEx(WH_MOUSE_LL, proc,
                        GetModuleHandle(curModule.ModuleName), 0);
                }
            }

            private delegate IntPtr LowLevelMouseProc(int nCode, IntPtr wParam, IntPtr lParam);

            private static IntPtr HookCallback(
                int nCode, IntPtr wParam, IntPtr lParam)
            {
                if (nCode >= 0 &&
                    MouseMessages.WM_LBUTTONDOWN == (MouseMessages)wParam)
                {
                    MSLLHOOKSTRUCT hookStruct = (MSLLHOOKSTRUCT)Marshal.PtrToStructure(lParam, typeof(MSLLHOOKSTRUCT));
                    Console.WriteLine(hookStruct.pt.x + ", " + hookStruct.pt.y);
                }
                return CallNextHookEx(_hookID, nCode, wParam, lParam);
            }

            private const int WH_MOUSE_LL = 14;

            private enum MouseMessages
            {
                WM_LBUTTONDOWN = 0x0201,
                WM_LBUTTONUP = 0x0202,
                WM_MOUSEMOVE = 0x0200,
                WM_MOUSEWHEEL = 0x020A,
                WM_RBUTTONDOWN = 0x0204,
                WM_RBUTTONUP = 0x0205
            }

            [StructLayout(LayoutKind.Sequential)]
            private struct POINT
            {
                public int x;
                public int y;
            }

            [StructLayout(LayoutKind.Sequential)]
            private struct MSLLHOOKSTRUCT
            {
                public POINT pt;
                public uint mouseData;
                public uint flags;
                public uint time;
                public IntPtr dwExtraInfo;
            }

            [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
            private static extern IntPtr SetWindowsHookEx(int idHook,
                LowLevelMouseProc lpfn, IntPtr hMod, uint dwThreadId);

            [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
            [return: MarshalAs(UnmanagedType.Bool)]
            private static extern bool UnhookWindowsHookEx(IntPtr hhk);

            [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
            private static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode,
                IntPtr wParam, IntPtr lParam);

            [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
            private static extern IntPtr GetModuleHandle(string lpModuleName);
        }

    }
}

Answer 1

Listen to WM_MOUSEMOVE

c＃：图片跟在应用程序之外的鼠标

1 个答案: