using ComPDFKit.NativeMethod; using Compdfkit_Tools.Helper; using System; using System.Collections.Generic; using System.Configuration; using System.Data; using System.Linq; using System.Threading.Tasks; using System.Windows; namespace DigitalSignature { /// /// Interaction logic for App.xaml /// public partial class App : Application { protected override void OnStartup(StartupEventArgs e) { base.OnStartup(e); LicenseVerify(); } private static bool LicenseVerify() { if (!CPDFSDKVerifier.LoadNativeLibrary()) return false; LicenseErrorCode verifyResult = CPDFSDKVerifier.LicenseVerify("license_key_windows.txt", true); return (verifyResult != LicenseErrorCode.E_LICENSE_SUCCESS); } } }