WinForm中自定义搜索框（水印、清空按钮、加载中图标）WinForm中⾃定义搜索框（⽔印、清空按钮、加载中图标） 1public partial class CustomSearchBar : TextBox 2 { 3private readonly Label lblwaterText = new Label();4 5private readonly PictureBox clearButton = new PictureBox();6 7private read...