Like this one
🗲 or this one
🗱 or
🌩 ... these are characters in the Windows Webdings font: [
^]. You can easily scale these up, and take a screen shot, and then create ... whatever.
Or, you can take a Label Control whose text is the symbol, set its 'BackColor to 'Transparent, and then set its 'Parent to the 'PictureBox, then set its 'Location in 'PictureBox co-ordinates:
in the designer:
// label1
//
this.label1.AutoSize = true;
this.label1.BackColor = System.Drawing.Color.Transparent;
this.label1.Font = new System.Drawing.Font("Webdings", 48F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(2)));
this.label1.ForeColor = System.Drawing.Color.Red;
this.label1.Location = new System.Drawing.Point(121, 229);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(93, 65);
this.label1.TabIndex = 10;
this.label1.Text = "~";
In the Form ';Load event:
label1.Parent = pictureBox1;
label1.Location = new Point(20,20);