How to override maximum 32x32 mouse size in Windows like this program can

Question

I\'d like for my program to be able to override the maximum imposed mouse size of 32x32 much like the program in the picture attached does, the cursor pictured is 72x72. Thi

Answer 1

If you are working with WPF, you can create your own Mouse cursor and assign it. But this is not a system wide mouse cursor change. Here's some code that would do the trick. In the code below I am creating a cursor 50x50 pixels. You can draw your own shape on to the RenderTargetBitmap

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();

        Mouse.OverrideCursor = CreateCursor(50,50, Brushes.Gold, null);
    }

    Cursor CreateCursor(double rx, double ry, SolidColorBrush brush, Pen pen)
    {
        var vis = new DrawingVisual();
        using (var dc = vis.RenderOpen())
        {
            dc.DrawRectangle(brush, new Pen(Brushes.Black, 0.1), new Rect(0, 0, rx, ry));
            dc.Close();
        }
        var rtb = new RenderTargetBitmap(64, 64, 96, 96, PixelFormats.Pbgra32);
        rtb.Render(vis);

        using (var ms1 = new MemoryStream())
        {
            var penc = new PngBitmapEncoder();
            penc.Frames.Add(BitmapFrame.Create(rtb));
            penc.Save(ms1);

            var pngBytes = ms1.ToArray();
            var size = pngBytes.GetLength(0);

            //.cur format spec http://en.wikipedia.org/wiki/ICO_(file_format)
            using (var ms = new MemoryStream())
            {
                {//ICONDIR Structure
                    ms.Write(BitConverter.GetBytes((Int16)0), 0, 2);//Reserved must be zero; 2 bytes
                    ms.Write(BitConverter.GetBytes((Int16)2), 0, 2);//image type 1 = ico 2 = cur; 2 bytes
                    ms.Write(BitConverter.GetBytes((Int16)1), 0, 2);//number of images; 2 bytes
                }

                {//ICONDIRENTRY structure
                    ms.WriteByte(32); //image width in pixels
                    ms.WriteByte(32); //image height in pixels

                    ms.WriteByte(0); //Number of Colors in the color palette. Should be 0 if the image doesn't use a color palette
                    ms.WriteByte(0); //reserved must be 0

                    ms.Write(BitConverter.GetBytes((Int16)(rx / 2.0)), 0, 2);//2 bytes. In CUR format: Specifies the horizontal coordinates of the hotspot in number of pixels from the left.
                    ms.Write(BitConverter.GetBytes((Int16)(ry / 2.0)), 0, 2);//2 bytes. In CUR format: Specifies the vertical coordinates of the hotspot in number of pixels from the top.

                    ms.Write(BitConverter.GetBytes(size), 0, 4);//Specifies the size of the image's data in bytes
                    ms.Write(BitConverter.GetBytes((Int32)22), 0, 4);//Specifies the offset of BMP or PNG data from the beginning of the ICO/CUR file
                }

                ms.Write(pngBytes, 0, size);//write the png data.
                ms.Seek(0, SeekOrigin.Begin);
                return new Cursor(ms);
            }
        }
    }

}