解决C# winForm自定义鼠标样式的两种实现方法详解

第一种：（调用系统api）
首先引入两个命名空间

using system.runtime.interopservices;
using system.reflection;

导入api

[dllimport("user32.dll")]
public static extern intptr loadcursorfromfile(string filename);
[dllimport("user32.dll")]
public static extern intptr setcursor(intptr cursorhandle);
[dllimport("user32.dll")]
 public static extern uint destroycursor(intptr cursorhandle);

接下来使用自己的鼠标样式

private void form1_load(object sender, eventargs e)
        {
            cursor mycursor = new cursor(cursor.current.handle);
            intptr colorcursorhandle = loadcursorfromfile("my.cur");//鼠标图标路径
              mycursor.gettype().invokemember("handle", bindingflags.public |
            bindingflags.nonpublic | bindingflags.instance |
            bindingflags.setfield, null, mycursor,
            new object[] { colorcursorhandle });
            this.cursor = mycursor;
        }

第二种：（不用api方式的，鼠标样式只需要一张背景透明的图片就行了，png或gif格式的）

public void setcursor(bitmap cursor, point hotpoint)
        {
            int hotx = hotpoint.x;
            int hoty = hotpoint.y;
            bitmap mynewcursor = new bitmap(cursor.width * 2 - hotx, cursor.height * 2 - hoty);
            graphics g = graphics.fromimage(mynewcursor);
            g.clear(color.fromargb(0, 0, 0, 0));
            g.drawimage(cursor, cursor.width - hotx, cursor.height - hoty, cursor.width,
            cursor.height);
            this.cursor = new cursor(mynewcursor.gethicon());

            g.dispose();
            mynewcursor.dispose();
        }

在你想要改变鼠标样式的事件里头使用这个方法就行了，如：

private void form1_load(object sender, eventargs e)
        {
            bitmap a=(bitmap)bitmap.fromfile("mycur.png");
            setcursor(a, new point(0, 0));
        }