Attempting to Simulate Mouse Click / Drag

Question

So I\'m trying to simulate the left mouse click and the left mouse release to do some automated dragging and dropping.

It\'s currently in a C# Winforms (Yes, winform

Answer 1

[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
    private static extern void mouse_event(uint dwFlags, int dx, int dy, uint cButtons, uint dwExtraInfo);

    [DllImport("user32.dll")]
    static extern bool SetCursorPos(int X, int Y);

    const uint MOUSEEVENTF_LEFTDOWN = 0x0002;
    const uint MOUSEEVENTF_LEFTUP = 0x0004;
    const uint MOUSEEVENTF_MOVE = 0x0001;

    static void Drag(int startX,int startY,int endX,int endY)
    {
        endX = endX - startX;
        endY = endY - startY;
        SetCursorPos(startX, startY);
        mouse_event(MOUSEEVENTF_LEFTDOWN, 0, 0, 0, 0);
        mouse_event(MOUSEEVENTF_MOVE, endX, endY, 0, 0);
        mouse_event(MOUSEEVENTF_LEFTUP, 0, 0, 0, 0);
    }