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C API Reference - License Methods

Method	Description
`DBR_InitLicense`	Read product key and activate the SDK.
`DBR_InitLicenseFromServer`	Initialize license and connect to the specified server for online verification.
`DBR_InitLicenseFromLicenseContent`	Initialize license from the license content on client machine for offline verification.
`DBR_OutputLicenseToString`	Output the license content to a string from the license server.
`DBR_OutputLicenseToStringPtr`	Output the license content to a string from the license server.
`DBR_FreeLicenseString`	Free memory allocated for the license string.

DBR_InitLicense

Read product key and activate the SDK.

DBR_API int DBR_InitLicense (void* barcodeReader, const char* pLicense)

Parameters

[in] barcodeReader Handle of the barcode reader instance.
[in] pLicense The product keys.

Return value

Returns error code (returns 0 if the function operates successfully).
You can call DBR_GetErrorString to get detailed error message.

Code Snippet

void* barcodeReader = DBR_CreateInstance();
DBR_InitLicense(barcodeReader, "t0260NwAAAHV***************");
DBR_DestroyInstance(barcodeReader);

DBR_InitLicenseFromServer

Initialize the license and connect to the specified server for online verification.

DBR_API int DBR_InitLicenseFromServer (void* barcodeReader, const char* pLicenseServer, const char* pLicenseKey)

Parameters

[in] barcodeReader Handle of the barcode reader instance.
[in] pLicenseServer The name/IP of the license server.
[in] pLicenseKey The license key.

Return value

Returns error code (returns 0 if the function operates successfully).
You can call DBR_GetErrorString to get detailed error message.

DBR_InitLicenseFromLicenseContent

Initialize barcode reader license from the license content on the client machine for offline verification.

DBR_API int DBR_InitLicenseFromLicenseContent (void* barcodeReader, const char* pLicenseKey, const char* pLicenseContent)	

Parameters

[in] barcodeReader Handle of the barcode reader instance.
[in] pLicenseKey The license key.
[in] pLicenseContent An encrypted string representing the license content (quota, expiration date, barcode type, etc.) obtained from the method DBR_OutputLicenseToString.

Return value

Returns error code (returns 0 if the function operates successfully).
You can call DBR_GetErrorString to get detailed error message.

DBR_OutputLicenseToString

Output the license content as an encrypted string from the license server to be used for offline license verification.

DBR_API int DBR_OutputLicenseToString (void* barcodeReader, char content[], int contentLen)

Parameters

[in] barcodeReader Handle of the barcode reader instance.
[in,out] content The output string which stores the content of license.
[in] contentLen The length of output string. The recommended length is 512 per license key.

Return value

Returns error code (returns 0 if the function operates successfully).
You can call DBR_GetErrorString to get detailed error message.

Remark

DBR_InitLicenseFromServer has to be successfully called before calling this method.

DBR_OutputLicenseToStringPtr

Output the license content as an encrypted string from the license server to be used for offline license verification.

DBR_API int DBR_OutputLicenseToStringPtr (void* barcodeReader, char** content)

Parameters

[in] barcodeReader Handle of the barcode reader instance.
[in,out] content The output string which stores the content of license.

Return value

Returns error code (returns 0 if the function operates successfully).
You can call DBR_GetErrorString to get detailed error message.

Remark

DBR_InitLicenseFromServer has to be successfully called before calling this method.

DBR_FreeLicenseString

Free memory allocated for the license string.

DBR_API void DBR_FreeLicenseString (char** content)

Parameters

[in] content The output string which stores the content of license.

Remark

DBR_OutputLicenseToStringPtr has to be successfully called before calling this method.