THtmlViewer component
property IDControl[const ID: string]: TObject;
Read only and run time only. The IDControl Property provides an easy way to get the instance handle of a Form control or image using the ID attribute defined in the control's HTML tag.
For a hidden form control the return is of type THiddenFormControlObj.
Example:
In the following, clicking Button1 checks the RadioButton control with the ID, "Rad1"
procedure TForm1.Button1Click(Sender: TObject);
var
Obj: TObject;
begin
Obj := Viewer.IDControl['Rad1'];
if (Obj is TRadioButton) then
TRadioButton(Obj).Checked := True;
end;