.net - 在WinForms/.NET中更改光标热点

Question

我在运行时从图像资源创建一个游标。新光标的“热点”始终设置为16x16(32x32图像)。是否可以在运行时更改HotSpot，还是需要创建.cur文件？

Answer 1

你当然可以。这是我的实用程序功能，请根据需要进行编辑:)

    public struct IconInfo
    {
        public bool fIcon;
        public int xHotspot;
        public int yHotspot;
        public IntPtr hbmMask;
        public IntPtr hbmColor;
    }
    [DllImport("user32.dll")]
    [return: MarshalAs(UnmanagedType.Bool)]
    public static extern bool GetIconInfo(IntPtr hIcon, ref IconInfo pIconInfo);
    [DllImport("user32.dll")]
    public static extern IntPtr CreateIconIndirect(ref IconInfo icon);

    /// <summary>
    /// Create a cursor from a bitmap without resizing and with the specified
    /// hot spot
    /// </summary>
    public static Cursor CreateCursorNoResize(Bitmap bmp, int xHotSpot, int yHotSpot)
    {
        IntPtr ptr = bmp.GetHicon();
        IconInfo tmp = new IconInfo();
        GetIconInfo(ptr, ref tmp);
        tmp.xHotspot = xHotSpot;
        tmp.yHotspot = yHotSpot;
        tmp.fIcon = false;
        ptr = CreateIconIndirect(ref tmp);
        return new Cursor(ptr);
    }


    /// <summary>
    /// Create a 32x32 cursor from a bitmap, with the hot spot in the middle
    /// </summary>
    public static Cursor CreateCursor(Bitmap bmp)
    {
        int xHotSpot = 16;
        int yHotSpot = 16;

        IntPtr ptr = ((Bitmap)ResizeImage(bmp, 32, 32)).GetHicon();
        IconInfo tmp = new IconInfo();
        GetIconInfo(ptr, ref tmp);
        tmp.xHotspot = xHotSpot;
        tmp.yHotspot = yHotSpot;
        tmp.fIcon = false;
        ptr = CreateIconIndirect(ref tmp);
        return new Cursor(ptr);
    }