LEADTOOLS Multimedia API Help
| LEADTOOLS Multimedia API Help > LEADTOOLS Multimedia Features > Multimedia Function References > IltmmMemory Interface > IltmmMemory::LockBuffer |
#include "ltmm.h"
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C Syntax |
HRESULT IltmmMemory_LockBuffer(pMem, pVal) |
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C++ Syntax |
HRESULT LockBuffer(pVal) |
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IltmmMemory *pMem; |
/* pointer to an interface */ |
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VARIANT *pVal; |
/* pointer to a VARIANT */ |
Locks the object's buffer to prevent access by any thread other than the calling thread.
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Parameter |
Description |
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pMem |
Pointer to an IltmmMemory interface. |
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pVal |
Pointer to a variable to be updated with a VARIANT containing a SAFEARRAY reference to the locked buffer. |
Returns
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S_OK |
The function was successful. |
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<> S_OK |
An error occurred. Refer to the Error Codes or the HRESULT error codes in the DirectShow documentation. |
Comments
This function obtains a pointer to the buffer in the form of a SAFEARRAY embedded in a VARIANT.
Call IltmmMemory::Unlock to unlock the buffer when it is no longer being used.
Required DLLs and Libraries
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LTMM For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application. |
Win32, x64
See Also
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Elements: |
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Topics: |
Example
For a C example, refer to Use ltmmMemory for Memory Conversion for C.
For a C++ example, refer to Use ltmmMemory for Memory Conversion for C++.
