Simulating Mouse Events

Question

Hello everyone,
I am attempting to simulate mouse click events (I have been using cursor.position to handle all the movements) and have run into a problem. I read the MSDN thread http://msdn.microsoft.com/en-us/library/ms171548(VS.80).aspx and it was very helpful, but I must be doing something wrong because it does not work. I made a test program to see if I could find the problem: I have a basic form with a button on it, when I click the button the cursor moves down and attempts to click. The cursor moves great but after that nothing; I have the code snippet below. Any thoughts? Thanks in advance!!

        private void startButton_Click(object sender, EventArgs e)
        {           
            Cursor.Position = new Point(Cursor.Position.X, Cursor.Position.Y + 100);

            MouseEventArgs click = new MouseEventArgs(MouseButtons.Left, 1, Cursor.Position.X,
                Cursor.Position.Y, 0);            
           
            OnMouseClick(click);    
        }

Answer 1

Since you moved the cursor down by increasing its Y-coordinate by 100 pixels it must be out of the button1 client rectangle, so why do you expect anything to happen? I mean in terms of the Button's reaction? If you position another button centered at the new location you should get a button2.Click event.

---

AlexB

Answer 2

Sorry for not clarifying . . . I do have a second button in place :-). If it helps just pretend the move mouse cursor code isn't there. I still cannot get that to work. Any ideas Alex?

Answer 3

Hi Carret,

Based on my understanding, the “OnMouseClick” method can only apply to the current control, in this scenario, the current is Form, instead of button.

In order to raise a global mouse left click event, we can use the mouse_event Function, I have tried to written a sample to test it, works for me.
public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

 

        [DllImport("user32.dll", CharSet = CharSet.Auto)]

        public static extern void mouse_event(UInt32 dwFlags,

    UInt32 dx,

    UInt32 dy,

    UInt32 dwData,

    IntPtr dwExtraInfo);

 

 

        private void Startbutton_Click(object sender, EventArgs e)

        {

            Cursor.Position = new Point(Cursor.Position.X, Cursor.Position.Y + 100);

 

            MouseEventArgs click = new MouseEventArgs(MouseButtons.Left, 1, Cursor.Position.X,

                Cursor.Position.Y, 0);

 

            const UInt32 MOUSEEVENTF_LEFTDOWN = 0x2;//left mouse down

            const UInt32 MOUSEEVENTF_LEFTUP   = 0x4; //left mouse up

 

            mouse_event(MOUSEEVENTF_LEFTDOWN, 0, 0, 0, IntPtr.Zero);

            mouse_event(MOUSEEVENTF_LEFTUP, 0, 0, 0, IntPtr.Zero);

        }

 

        private void button1_Click(object sender, EventArgs e)

        {

            MessageBox.Show("button1 clicked");

        }

 

        private void button1_MouseClick(object sender, MouseEventArgs e)

        {

            MessageBox.Show("button1 mouse clicked");

        }

    }

Regards,

Xun

---

Please remember to mark the replies as answers if they help and unmark them if they provide no help.