How to call the OnChange event of “Select” ? (Delphi - WebBrowser)

Question

I\'m using Delphi and WebBrowser componenet to navigate a html page . the page have a Combobox . is there any way to call the OnChange event ?

The ComboBox is like this

Answer 1

to execute the onchange event you can use the execScript method

check this sample

uses
  MSHTML;

var
  Doc: IHTMLDocument2;      
  HTMLWindow: IHTMLWindow2;           
begin
  Doc := WebBrowser1.Document as IHTMLDocument2;
  if not Assigned(Doc) then
    Exit;
  HTMLWindow := Doc.parentWindow;
  if not Assigned(HTMLWindow) then
    Exit;

  HTMLWindow.execScript('yourfunctioname()', 'JavaScript'); 
end;

for more info check this excellent article

• How to call JavaScript functions in a TWebBrowser from Delphi

Answer 2

Inspired by the response. NET have been using the structures below:

FrameSet Document Elements Item Name Value Change ;
EWB.OleObject.Document.Frames.Item('mainFrame').Document.Forms.Item('invoiceForm').Elements.Item('inputname').Value:= '123456';

or

FrameSet Document Elements Items Lenth;

EWB.OleObject.Document.Forms.Item('invoiceForm').Elements.Length;