主题：[原创]如何将窗口中浏览器控件的部分区域，指定长宽大小，保存为图片？

参考测试代码

Dim web As New System.Windows.Forms.WebBrowser()
web.Navigate("http://foxtable.com")
web.width = 1000
web.height = 500
Do Until web.ReadyState = 4
    Application.DoEvents
Loop

Dim b = new Bitmap(1000, 500)
web.DrawToBitmap(b, new Rectangle(0,0,b.width, b.height))
b.save("d:\test.jpg")

Dim proc As new Process
proc.file = "d:\test.jpg"
proc.start

Dim web = e.form.controls("webbrowser1").basecontrol

Dim b = new Bitmap(1000, 500)
web.DrawToBitmap(b, new Rectangle(0,0,b.width, b.height))
b.save("d:\test.jpg")

Dim proc As new Process
proc.file = "d:\test.jpg"
proc.start