References ▼
Locks a region in the objects buffer.
#include "ltmm.h"
| Language | Syntax |
|---|---|
| C | HRESULT IltmmMemory_LockRegion(pMem, Index, Count, pVal) |
| C++ | HRESULT LockRegion(Index, Count, pVal) |
Pointer to an IltmmMemory interface.
Zero based index, or offset, of the region to lock.
Size of the region to lock, in bytes.
Pointer to a variable to be updated with a VARIANT containing a SAFEARRAY reference to the locked region.
| Value | Meaning |
|---|---|
| S_OK | The function was successful. |
| <> S_OK | An error occurred. Refer to the Error Codes or the HRESULT error codes in the DirectShow documentation. |
If the requested size of the region is larger than the size available after the offset, the function locks only the region between the offset and the end of the buffer.
This function obtains a pointer to the region in the form of a SAFEARRAY embedded in a VARIANT.
Call IltmmMemory::Unlock to unlock the region when it is no longer being used.
Win32, x64.
| Language | Example |
|---|---|
| C | Use ltmmMemory for Memory Conversion |
| C++ | Use ltmmMemory for Memory Conversion |
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