Find the taskbar and system tray window handles #47

The task bar is a top level window which has class name "Shell_TrayWnd". We can find it using the Windows FindWindow API function as follows:

function TaskbarHandle: THandle;
begin
  Result := FindWindow('Shell_TrayWnd', nil);
end;

The system tray is a child window of the task bar which has class name "TrayNotifyWnd". Because it's a child window, we need to use the FindWindowEx Windows API function, passing the task bar's handle as the parent:

function TrayHandle: THandle;
begin
  Result := FindWindowEx(TaskbarHandle, 0, 'TrayNotifyWnd', nil);
end;