C#FindWindow等相关方法

2015-04-28 08:39:28 访问(3539) 赞(0) 踩(0)

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace WindowsFormsApplication1
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }

        public void DO()
        {
            var hNotePad = FindWindow("Notepad", null);
            if (hNotePad == IntPtr.Zero)
                throw new Exception("notepad 没有打开");

            IntPtr hDialog = IntPtr.Zero;
            EnumWindows((hwnd, lParam) =>
            {
                var owner = GetWindow(hwnd, GW_OWNER);
                if (owner == hNotePad)
                    hDialog = hwnd;
                return true;
            }, IntPtr.Zero);
            if (hDialog == IntPtr.Zero)
                throw new Exception("请先打开字体对话框");

            var sb = new StringBuilder(250);
            GetWindowText(hDialog, sb, 250);
            if (sb.ToString() != "字体")
                throw new Exception("打开的不是字体对话框");

            var hCombobox = GetDlgItem(hDialog, 0x470);

            Console.WriteLine("--------- 对话框上的控件列表 --------");
            EnumChildWindows(hDialog, (hChild, _) =>
            {
                var id = GetDlgCtrlID(hChild);
                var sb2 = new StringBuilder(250);
                GetClassName(hChild, sb, 250);
                GetWindowText(hChild, sb2, 250);
                Console.WriteLine("0x{0:x} (id = 0x{1:x}) : {2} (\"{3}\")", hChild, id, sb, sb2);
                return true;
            }, IntPtr.Zero);

            var item = "华文中宋";
            var index = SendMessage(hCombobox, CB_FINDSTRING, 0, item);

            Console.WriteLine("选取'{0}', index={1}", item, index);
            SendMessage(hCombobox, CB_SELECTSTRING, 0, item);
        }

        public delegate bool EnumWindowsProc(IntPtr hwnd, IntPtr lParam);

        [DllImport("user32.dll")]
        private static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

        [DllImport("user32.dll")]
        private static extern IntPtr GetWindow(IntPtr hWnd, int uCmd);

        [DllImport("user32.dll")]
        private static extern bool EnumWindows(EnumWindowsProc lpEnumFunc, IntPtr lParam);

        [DllImport("user32.dll")]
        private static extern IntPtr GetDlgItem(IntPtr hDlg, int nIDDlgItem);

        [DllImport("user32.dll")]
        private static extern bool EnumChildWindows(IntPtr hwndParent, EnumWindowsProc lpEnumFunc, IntPtr lParam);

        [DllImport("user32.dll")]
        private static extern int GetDlgCtrlID(IntPtr hwndCtl);

        [DllImport("user32.dll")]
        private static extern int GetClassName(IntPtr hWnd, StringBuilder lpClassName, int nMaxCount);

        [DllImport("user32.dll")]
        private static extern int GetWindowText(IntPtr hWnd, StringBuilder lpString, int nMaxCount);

        [DllImport("user32.dll")]
        private static extern IntPtr SendMessage(IntPtr hWnd, UInt32 msg, int wParam, IntPtr lParam);

        [DllImport("user32.dll")]
        private static extern IntPtr SendMessage(IntPtr hWnd, UInt32 msg, int wParam, string lParam);

        private const int GW_OWNER = 4;
        private const int CB_FINDSTRING = 0x014C;
        private const int CB_SELECTSTRING = 0x014D;
        private const int CB_SETCURSEL = 0x014E;

        private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                DO();
            }
            catch (Exception err)
            {
                MessageBox.Show(err.Message);
            }
        }
    }
}