Winform仿制QQ微信聊天窗口气泡

因为公司业务原因，不能上传原始项目，这是简化版本。

临时设计的窗体和气泡样式，有需要可以重新设计。效果如下：

主要原理：一个TextBlock + 一个三角形 

 

项目结构：

-- Form1 窗体类

-- Item 控件类（气泡）

Form1前端代码：

#region Windows 窗体设计器生成的代码

        /// <summary>
        /// 设计器支持所需的方法 - 不要
        /// 使用代码编辑器修改此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            this.panel1 = new System.Windows.Forms.Panel();
            this.textBox1 = new System.Windows.Forms.TextBox();
            this.button1 = new System.Windows.Forms.Button();
            this.SuspendLayout();
            // 
            // panel1
            // 
            this.panel1.AutoScroll = true;
            this.panel1.Location = new System.Drawing.Point(0, 0);
            this.panel1.Name = "panel1";
            this.panel1.Size = new System.Drawing.Size(377, 404);
            this.panel1.TabIndex = 0;

            // 
            // textBox1
            // 
            this.textBox1.Location = new System.Drawing.Point(0, 406);
            this.textBox1.Multiline = true;
            this.textBox1.Name = "textBox1";
            this.textBox1.Size = new System.Drawing.Size(377, 65);
            this.textBox1.TabIndex = 1;

            // 
            // button1
            // 
            this.button1.Location = new System.Drawing.Point(302, 477);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(75, 23);
            this.button1.TabIndex = 2;
            this.button1.Text = "Send";
            this.button1.UseVisualStyleBackColor = true;
            this.button1.Click += new System.EventHandler(this.button1_Click);

            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(380, 504);
            this.Controls.Add(this.button1);
            this.Controls.Add(this.textBox1);
            this.Controls.Add(this.panel1);
            this.Name = "Form1";
            this.Text = "Form1";
            this.ResumeLayout(false);
            this.PerformLayout();


        }

        #endregion

        private System.Windows.Forms.Panel panel1;
        private System.Windows.Forms.TextBox textBox1;
        private System.Windows.Forms.Button button1;

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