如何在c#中执行鼠标事件？ 这里的问题在哪里

Question

I'm trying do do three mousclicks in my c# programm. I found this on the inte.net: https://forum.chip.de/discussion/1668318/visual-studio-c-2010-mausklick-simulieren

So I've tried this, but for me nothing is happening.

        private const UInt32 MouseEventLeftUp = 0x0004;
        [DllImport("user32", EntryPoint = "mouse_event")]
        private static extern void mouse_event(UInt32 dwFlags, UInt32 dx, UInt32 dy, UInt32 dwData, IntPtr dwExtraInfo);

And here the mousclicks i'm trying

                Console.WriteLine(DateTime.Now + " Vollbild");
                mouse_event(MouseEventLeftDown, 1700, 1138, 0, new System.IntPtr());
                mouse_event(MouseEventLeftUp, 1700, 1138, 0, new System.IntPtr());
                Thread.Sleep(2000);
                // OEE
                Console.WriteLine(DateTime.Now + " OEE");
                mouse_event(MouseEventLeftDown, 1470, 380, 0, new System.IntPtr());
                mouse_event(MouseEventLeftUp, 1470, 380, 0, new System.IntPtr());
                Thread.Sleep(15000);
                //Astronic
                Console.WriteLine(DateTime.Now + " Astronic");
                mouse_event(MouseEventLeftDown, 220, 370, 0, new System.IntPtr());
                mouse_event(MouseEventLeftUp, 220, 370, 0, new System.IntPtr());

Anyone have a idea where is the problem here

Answer 1

If you were to move mouse to the position of (1700, 1138) then click, try this instead:

 mouse_event(0x0001, 1700, 1138, 0, new IntPtr(0))
 mouse_event(MouseEventLeftDown, 0, 0, 0, new System.IntPtr(0))
 mouse_event(MouseEventLeftUp, 0, 0, 0, new System.IntPtr(0))

but these ain't moving the mouse to an absolute point (1700, 1138) on screen, instead it derived from the last mouse event proc position or the console top left by default (I guess?)

If you want to move the mouse to absolute position on screen, combine it with the flag MOUSEEVENTF_ABSOLUTE (0x8000) as following:

 mouse_event(0x8000 | 0x0001, (ushort.MaxValue / SCREEN_WIDTH) * 1700, (ushort.MaxValue / SCREEN_HEIGHT) * 1138, 0, new IntPtr(0));
 mouse_event(LEFT_DOWN, 0, 0, 0, new System.IntPtr(0));
 mouse_event(LEFT_UP, 0, 0, 0, new System.IntPtr(0));

Note that I multiplied it with (ushort.MaxValue / SCREEN_WIDTH) , (ushort.MaxValue / SCREEN_HEIGHT) , as explained in the Remark section in https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-mouse_event