mouse_event vs real mouse event ( gameing bot )

background : I wrote a bot to play poker in pokerstars.com. Since 2022 09 14 , the simulation for mouse-move and mouse-click is not working any more.

code: I used below c# statement to make a click.

    enum MouseEventFlag : uint
    {
        Move = 0x0001,
        LeftDown = 0x0002,
        LeftUp = 0x0004
    }

declaration

[DllImport("user32.dll", EntryPoint = "mouse_event")]

static extern void mouse_event(MouseEventFlag dwFlags, int dx, int dy, int cButtons, int dwExtraInfo);

call

mouse_event(MouseEventFlag.LeftDown | MouseEventFlag.LeftUp, 0, 0, 0, 0);

current situation :

• when I need to play a CHECK action, I used to click the CHECK BUTTON / or it is simulated by my program-bot with mouse_event() called.
• now : the simulation do not work, it looks like ANY PROGRAMMED actions is EATTEN by the pokerstar application. but I can still
  click the CHECK BUTTON manually.

I did a search about topics in stackoverflow, experts saying there is NO DIFFERENCE between the manual/simulation click.

any hint to solved this? thanks