bool OESzmapIsLicensed(const char *feature=0, unsigned int *expdate=0)

Determine whether a valid license file is present. This function may be called without a legitimate run-time license to determine whether it is safe to call any of OESzmap’s functionality.

The features argument can be used to check for a valid license to OESzmap along with that feature. For example, to verify that OESzmap can be used from Python:

if (! OESzmapIsLicensed("python"))
    Console.WriteLine("OESzmap is not licensed for the python feature");

The second argument can be used to get the expiration date of the license. This is an array of size three with the date returned as {day, month, year}. Even if the function returns false due to an expired license, the expdate will show that expiration date. A value of a zeroes implies that no license or date was found.

int[] expdate = new int[3];
if (OESzmapIsLicensed(0, expdate))
    Console.WriteLine("License expires: day: {0}  month: {1} year: {2}",
                      expdate[0], expdate[1], expdate[2]);