How get current url address on mains browsers using UIAutomation? - delphi

Question

I have a source that promises to get the active url from any browser using UIAutomation, but I have difficulty about how to call the main function and show result in a ListBox for example. Then, how would it?
Here is my code:
uses
UIAutomationClient_TLB, activeX;
var
Firefox_quebrou: boolean;
function GetURL(hTargetWnd: HWND): string;
function Enumerar(pParent: IUIAutomationElement; Scope: TreeScope; pCondition: IUIAutomationCondition): String;
var
found : IUIAutomationElementArray;
ALen : Integer;
i : Integer;
iElement : IUIAutomationElement;
retorno: integer;
value : WideString;
iInter: IInterface;
ValPattern : IUIAutomationValuePattern;
begin
Result := '';
Firefox_quebrou := false;
if pParent = nil then
Exit;
pParent.FindAll(Scope, pCondition, found);
found.Get_Length(ALen);
for i := 1 to ALen - 1 do
begin
found.GetElement(i, iElement);
iElement.Get_CurrentControlType(retorno);
if (
(retorno = UIA_EditControlTypeId) or
(retorno = UIA_GroupControlTypeId)
) then //UIA_DocumentControlTypeId
begin
iElement.GetCurrentPattern(UIA_ValuePatternId, iInter);
if Assigned(iInter) then
begin
if iInter.QueryInterface(IID_IUIAutomationValuePattern, ValPattern) = S_OK then
begin
ValPattern.Get_CurrentValue(value);
Result := trim(value);
Firefox_quebrou := true;
Break;
end;
end;
end;
if not Firefox_quebrou then
begin
Result := Enumerar(iElement, Scope, pCondition);
end;
end;
end;
var
UIAuto : IUIAutomation;
Ret : Integer;
RootElement : IUIAutomationElement;
Scope : TreeScope;
varProp : OleVariant;
pCondition : IUIAutomationCondition;
begin
Result := '';
try
UIAuto := CoCUIAutomation.Create;
if Succeeded(UIAuto.ElementFromHandle(hTargetWnd, RootElement)) then
begin
TVariantArg(varProp).vt := VT_BOOL;
TVariantArg(varProp).vbool := True;
UIAuto.CreatePropertyCondition(UIA_IsControlElementPropertyId,
varProp,
pCondition);
Scope := TreeScope_Element or TreeScope_Children;
Result := Enumerar(RootElement, Scope, pCondition);
end;
except
Result := '';
end;
end;