public static void SendMouseInput(int positionX, int positionY, int maxX, int maxY, bool leftDown)
{
if(positionX > int.MaxValue)
throw new ArgumentOutOfRangeException("positionX");
if(positionY > int.MaxValue)
throw new ArgumentOutOfRangeException("positionY");
Input[] i = new Input[2];
// move the mouse to the position specified
i[0] = new Input();
i[0].Type = InputMouse;
i[0].MouseInput.X = (positionX * 65535) / maxX;
i[0].MouseInput.Y = (positionY * 65535) / maxY;
i[0].MouseInput.Flags = MouseEventAbsolute | MouseEventMove;
// determine if we need to send a mouse down or mouse up event
if(!lastLeftDown && leftDown)
{
i[1] = new Input();
i[1].Type = InputMouse;
i[1].MouseInput.Flags = MouseEventLeftDown;
}
else if(lastLeftDown && !leftDown)
{
i[1] = new Input();
i[1].Type = InputMouse;
i[1].MouseInput.Flags = MouseEventLeftUp;
}
lastLeftDown = leftDown;
// send it off
uint result = SendInput(2, i, Marshal.SizeOf(i[0]));
if(result == 0)
throw new Win32Exception(Marshal.GetLastWin32Error());
}
private static extern uint SendInput(uint numInputs, Input[] inputs, int size);