MessageSender/Win32.cs at master · pbalint/MessageSender · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace MessageSender
{
    public class Win32
    {
        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        public static extern IntPtr FindWindow(string? lpClassName, string? lpWindowName);

        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        public static extern IntPtr FindWindowEx(IntPtr parent, IntPtr afterChild, string? lpClassName, string? lpWindowName);

        public delegate bool EnumWindowsProc(IntPtr hWnd, ref IntPtr lParam);

        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        [return: MarshalAs(UnmanagedType.Bool)]
        public static extern bool EnumWindows(EnumWindowsProc lpEnumFunc, IntPtr lParam);

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

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

        public static string GetWindowText(IntPtr hWnd)
        {
            int length = GetWindowTextLength(hWnd);
            StringBuilder sb = new StringBuilder(length + 1);
            GetWindowText(hWnd, sb, sb.Capacity);
            return sb.ToString();
        }

        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        public static extern int GetClassName(IntPtr hWnd, StringBuilder lpString, nint nMaxCount);

        public static String GetWindowClass(IntPtr hWnd)
        {
            StringBuilder sb = new StringBuilder(256);
            if (GetClassName(hWnd, sb, sb.Capacity) > 0)
            {
                return sb.ToString();
            }
            else
            {
                return "";
            }
        }

        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        public static extern nuint RegisterWindowMessage(string MsgId);

        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        public static extern IntPtr SendMessage(IntPtr hWnd, nuint Msg, nint wParam, nint lParam);
    }
}