[Setup]
AppName=My Application
AppVersion=1.5
DefaultDirName={pf}\My Application
[code]
function IsNetworkAlive(var aFlags: DWord): Bool; external 'IsNetworkAlive@Sensapi.dll stdcall';
procedure InitializeWizard();
var
dwFlags: DWord;
begin
if IsNetworkAlive(dwFlags) then
MsgBox('Ok', mbConfirmation, MB_OK)
else
MsgBox('No', mbConfirmation, MB_OK);
end;