Question

I’m creating a cursor at runtime from a image resource. The HotSpot of the new Cursor is always set to 16×16 (32×32 image). Is it possible to change the HotSpot at runtime or will I need to create .cur files?

Answer 1

You sure can. Here are my utility functions, edit as you see fit 🙂

    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);     }