小编Reg*_*ath的帖子

我想知道如何在 c#(Visual Studio) 中为带有圆角的文本框创建一个类。有人可以帮助我吗？我在网上找到了一个代码来创建它，但无法放大（拉伸）它

using System.Windows.Forms;
using System.Drawing;
using System;

class round : TextBox
{
    [System.Runtime.InteropServices.DllImport("gdi32.dll", EntryPoint = "CreateRoundRectRgn")]
    private static extern IntPtr CreateRoundRectRgn
    (
        int nLeftRect, // X-coordinate of upper-left corner or padding at start
        int nTopRect,// Y-coordinate of upper-left corner or padding at the top of the textbox
        int nRightRect, // X-coordinate of lower-right corner or Width of the object
        int nBottomRect,// Y-coordinate of lower-right corner or Height of the object
                        //RADIUS, how round do you want it …