Question SetAttribute on List in WebBrowser

[ProgRAM]

i just create application that can login to a web but in this web the login include list
and when i put this "WebBrowser1.Document.GetElementById("DropDownList1").SetAttribute("Value", ComboBox1.Text)"
i hit my login Button and then the list in the web is blank
What i need to do?

 

[david_day]

It's tough without knowing what the HTML looks like, but I'd assume it has something to do with the space in your GetElementByID or perhaps your value in ComboBox1 is wrong.