#include "ltmm.h"

C Syntax

HRESULT IltmmSupportManager_UnlockSupport(pSupportManager, Support, Key)

C++ Syntax

HRESULT UnlockSupport(Support, Key)

IltmmSupportManager * pSupportManager;

pointer to an interface

long Support;

support type


key to unlock

Unlocks support for converting the DVD format to other formats.

Parameter Description
pSupportManager Pointer to the IltmmSupportManager interface.
Support The unlock support type. Possible values are:
  Value Meaning
  L_SUPPORT_CONVERTFROMDVD Support for converting the DVD format to other formats.
Key Character string that contains the key to unlock the feature.



The function was successful.

<> S_OK

An error occurred. Refer to the Error Codes or the HRESULT error codes in the DirectShow documentation.

Required DLLs and Libraries


For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.


During conversion the Convert object checks whether the ltmmSupportManager object is loaded and whether the DVD conversion capability is unlocked. Use the IltmmSupportManager::UnlockSupport function to unlock support for DVD conversion. Use the IltmmSupportManager::IsSupportLocked function to determine whether support for DVD conversion is unlocked.

The user must unlock support for a specific feature before using that feature. The Key must be obtained from LEAD. Contact


Win32, x64

See Also




Multimedia Function Group


For a C example, refer to IltmmSupportManager::UnlockSupport

For a C++ example, refer to IltmmSupportManager::UnlockSupport

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