L_LTKRN_API L_INT L_SetLicenseBuffer (pLicenseBuffer, nSize, pszDeveloperKey)
Sets the runtime license for LEADTOOLS and unlocks support for optional features such as LEADTOOLS Imaging Pro, Document and Medical Imaging capabilities, or PDF support.
Pointer to a memory buffer that contains the entire LEADTOOLS runtime license.
The size, in bytes, of the buffer pointed to by
Character string containing the developer key.
|SUCCESS||The function was successful.|
|< 1||An error occurred. Refer to Return Codes.|
You must use this function to set the runtime license for LEADTOOLS and to unlock support for any optional features that you have licensed. If you do not set a runtime license, your application will display a "nag" message dialog at runtime, indicating that you have developed the application without a valid runtime license.
In order to obtain a runtime license and developer key, you must contact LEAD. For more information, refer to About LEADTOOLS Runtime Licenses.
For information about LEADTOOLS Document/Medical capabilities, contact LEAD.
To determine if support for optional features has been unlocked, use the L_IsSupportLocked function.
To set the runtime license from a disk file instead of a memory buffer, use the L_SetLicenseFile function.
Required DLLs and Libraries
Win32, x64, Linux.
Set the LEADTOOLS runtime license from a memory buffer.
#define MY_LICENSE_FILE L_TEXT("d:\\temp\\TestLic.lic")
#define MY_DEVELOPER_KEY L_TEXT("xyz123abc")
/* read the file */
HANDLE hFile = CreateFile(MY_LICENSE_FILE, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);
DWORD dwSize = GetFileSize(hFile, NULL);
L_UCHAR* pBuf = (L_UCHAR*)malloc(dwSize);
ReadFile(hFile, (LPVOID)pBuf, dwSize, &dwRead, NULL);
/* set the runtime license */
L_INT nRet = L_SetLicenseBuffer(pBuf, dwRead, MY_DEVELOPER_KEY);
/* check for unlocked support */
MessageBox(NULL, L_TEXT("Medical Locked\n"), L_TEXT(""), MB_OK);
MessageBox(NULL, L_TEXT("Medical Unlocked\n"), L_TEXT(""), MB_OK);
Medical Web Viewer .NET
.NET, Java, Android, and iOS/macOS Assemblies
C API/C++ Class Libraries