/// <summary>
/// 鼠标事件
/// </summary>
/// <param name="flags">事件类型</param>
/// <param name="dx">x坐标值(0~65535)</param>
/// <param name="dy">y坐标值(0~65535)</param>
/// <param name="data">滚动值(120一个单位)</param>
/// <param name="extraInfo">不支持</param>
[DllImport("user32.dll")]
static extern void mouse_event(MouseEventFlag flags, int dx, int dy, uint data, UIntPtr extraInfo);

/// <summary>
/// 鼠标操作标志位集合
/// </summary>
[Flags]
enum MouseEventFlag : uint
{
/// <summary>
/// 鼠标移动事件
/// </summary>
Move = 0x0001,

/// <summary>
/// 鼠标左键按下事件
/// </summary>
LeftDown = 0x0002,
LeftUp = 0x0004,
RightDown = 0x0008,
RightUp = 0x0010,
MiddleDown = 0x0020,
MiddleUp = 0x0040,
XDown = 0x0080,
XUp = 0x0100,
Wheel = 0x0800,
VirtualDesk = 0x4000,
/// <summary>
/// 设置鼠标坐标为绝对位置（dx,dy）,否则为距离最后一次事件触发的相对位置
/// </summary>
Absolute = 0x8000
}

/// <summary>
/// 触发鼠标事件
/// </summary>
/// <param name="x"></param>
/// <param name="y"></param>
private static void DoMouseClick(int x, int y)
{
  int dx = (int)((double)x / Screen.PrimaryScreen.Bounds.Width * 65535); //屏幕分辨率映射到0~65535(0xffff,即16位)之间
  int dy = (int)((double)y / Screen.PrimaryScreen.Bounds.Height * 0xffff); //转换为double类型运算，否则值为0、1
  mouse_event(MouseEventFlag.Move | MouseEventFlag.LeftDown | MouseEventFlag.LeftUp | MouseEventFlag.Absolute, dx, dy, 0, new UIntPtr(0)); //点击
}

/// <summary>
/// 键盘事件
/// </summary>
/// <param name="bVk"> virtual-key code</param>
/// <param name="bScan">hardware scan code</param>
/// <param name="dwFlags"> flags specifying various function options</param>
/// <param name="dwExtraInfo"> additional data associated with keystroke</param>
[DllImport("user32.dll")]
public static extern void keybd_event(byte bVk, byte bScan, int dwFlags, int dwExtraInfo);

keybd_event((byte)Keys.ControlKey, 0, 0, 0);
keybd_event((byte)Keys.C, 0, 0, 0);
keybd_event((byte)Keys.ControlKey, 0, 2, 0);
keybd_event((byte)Keys.C, 0, 2, 0);