After buying a license of Video Capture SDK, you will receive the serial number. To get rid of nag screen during the run time, you will need to activate control via this method.

procedure SetLicenseKey(LicenseKey: WideString);

__fastcall SetLicenseKey(BSTR LicenseKey);

public SetLicenseKey(String LicenseKey);

Public Sub SetLicenseKey(LicenseKey As String)

public SetLicenseKey(string LicenseKey);

SetLicenseKey(BSTR LicenseKey);

SetLicenseKey

public SetLicenseKey($LicenseKey);