How i can simulate a double mouse click on window ( i khow handle) on x, y coordinate, using SendInput?

Question

How i can simulate a double mouse click on window ( i know handle of this window) on x, y coordinate, using SendInput?

Answer 1

void DoubleClick(int x, int y)
{
    const double XSCALEFACTOR = 65535 / (GetSystemMetrics(SM_CXSCREEN) - 1);
    const double YSCALEFACTOR = 65535 / (GetSystemMetrics(SM_CYSCREEN) - 1);

    POINT cursorPos;
    GetCursorPos(&cursorPos);

    double cx = cursorPos.x * XSCALEFACTOR;
    double cy = cursorPos.y * YSCALEFACTOR;

    double nx = x * XSCALEFACTOR;
    double ny = y * YSCALEFACTOR;

    INPUT Input={0};
    Input.type = INPUT_MOUSE;

    Input.mi.dx = (LONG)nx;
    Input.mi.dy = (LONG)ny;

    Input.mi.dwFlags = MOUSEEVENTF_MOVE | MOUSEEVENTF_ABSOLUTE | MOUSEEVENTF_LEFTDOWN | MOUSEEVENTF_LEFTUP;

    SendInput(1,&Input,sizeof(INPUT));
    SendInput(1,&Input,sizeof(INPUT));

    Input.mi.dx = (LONG)cx;
    Input.mi.dy = (LONG)cy;

    Input.mi.dwFlags = MOUSEEVENTF_MOVE | MOUSEEVENTF_ABSOLUTE;

    SendInput(1,&Input,sizeof(INPUT));
}

You can use GetWindowRect() to get the window position from its handle and pass relative x and y to DoubleClick function:

RECT rect;
GetWindowRect(hwnd, &rect);

HWND phwnd = GetForegroundWindow();

SetForegroundWindow(hwnd);

DoubleClick(rect.left + x, rect.top + y);

SetForegroundWindow(phwnd); // To activate previous window

Answer 2

This will simulate a double click at certain coordinates

  SetCursorPos(X,Y);
  mouse_event(MOUSEEVENTF_LEFTDOWN | MOUSEEVENTF_LEFTUP,0,0,0,0);
  mouse_event(MOUSEEVENTF_LEFTDOWN | MOUSEEVENTF_LEFTUP,0,0,0,0);

Answer 3

You can specify your goal (best) or the method, but if you try to specify both, more often than not the answer is going to be "that doesn't work like that".

SendInput doesn't work like that, it simulates mouse activity on the screen, which will be delivered to whatever window is visible at that location (or has mouse capture), not the window of your choice.

To deliver a double-click to a specific window, try PostMessage(hwnd, WM_LBUTTONDBLCLK, 0, MAKELPARAM(x, y)).