C#のメモ帳/ツール紹介(内容を信じるな)

参考
緑のバイク様
http://homepage3.nifty.com/midori_no_bike/CS/
ユーザ入出力＞マウスの自動操作
2012/05/27記事作成、引用

using System.Runtime.InteropServices;

[DllImport("user32.dll")]
extern static uint SendInput(uint nInputs, INPUT[] pInputs, int cbSize);

[StructLayout(LayoutKind.Sequential)]
struct INPUT
{
    public int type;
    public MOUSEINPUT mi;
}

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

const int MOUSEEVENTF_LEFTDOWN = 0x0002;  // 左ボタン Down
const int MOUSEEVENTF_LEFTUP = 0x0004;  // 左ボタン Up

private void click()
{
    //struct 配列の宣言
    INPUT[] input = new INPUT[2];
    //左ボタン Down
    input[0].mi.dwFlags = MOUSEEVENTF_LEFTDOWN;
    //左ボタン Up
    input[1].mi.dwFlags = MOUSEEVENTF_LEFTUP;
    //イベントの一括生成
    SendInput(2, input, Marshal.SizeOf(input[0]));
}

click();