C# 自定义鼠标光标

C# 自定义鼠标光标（位图+颜色+大小）

用户可自定义位图，自定义颜色，自定义光标大小

• 1.包含的命名空间：

using System.Runtime.InteropServices;
using System.Windows.Forms;
using System.Drawing;

• 2.类定义

 class CursorUserDefine
    {
    
    
        [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);

        public static Cursor CreateCursor(Bitmap bmp, Color corlor, int xHotSpot, int yHotSpot)
        {
    
    
            //光标颜色设置
            for (int i = 0; i < bmp.Height; ++i)
            {
    
    
                for (int j = 0; j < bmp.Width; ++j)
                {
    
    
                    bmp.SetPixel(j, i, Color.FromArgb(corlor.R, corlor.G, corlor.B));
                }
            }
            IntPtr ptr = bmp.GetHicon();
            IconInfo tmp = new IconInfo();
            GetIconInfo(ptr, ref tmp);
            tmp.xHotspot = xHotSpot;//大小
            tmp.yHotspot = yHotSpot;
            tmp.fIcon = false;
            ptr = CreateIconIndirect(ref tmp);
            return new Cursor(ptr);
        }

        public struct IconInfo
        {
    
    
            public bool fIcon;
            public int xHotspot;
            public int yHotspot;
            public IntPtr hbmMask;
            public IntPtr hbmColor;
        }
    }

• 3.调用

//变量定义
int nWidth = 5;//设定位图大小
int nHeight  = 5;
int xHotSpot = 5;//设定光标大小
int yHotSpot = 5;
Bitmap bmp = new Bitmap(Image.FromFile("image.bmp"));  // 加载图像
Color color_choose = Color.Black;//设定光标位图颜色

//在需要设置鼠标光标的位置调用下面函数即可，注意调用前根据需要更新位图、大小、颜色。
this.Cursor = CursorUserDefine.CreateCursor(new Bitmap(bmp，new Size(nWidth, nHeight)), color_choose, xHotSpot, yHotSpot);