using?System;
using?System.Runtime.InteropServices;

namespace?發消息
{
????public?class?Test
????{
????????public?const?int?USER?=?0x500;
????????public?const?int?MYMESSAGE?=?USER?+?1;

????????public?struct?My_lParam
????????{
????????????public?int?i;
????????????public?string?s;
????????}

????????[DllImport（“User32.dll“?EntryPoint?=?“SendMessage“）]

????????private?static?extern?int?SendMessage（
????????????IntPtr?hWnd
????????????int?Msg
????????????int?wParam
????????????ref?My_lParam?lParam
????????????）;

????????[DllImport（“User32.dll“?EntryPoint?=?“FindWindow“）]
????????private?extern?static?IntPtr?FindWindow（string?lpClassName?string?lpWindowName）;

????????public?void?SendMessage（）
????????{
????????????IntPtr?ptr?=?FindWindow（null?“Main“）;//獲