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 |
Help Collections
Raster .NET | C API | C++ Class Library | HTML5 JavaScript
Document .NET | C API | C++ Class Library | HTML5 JavaScript
Medical .NET | C API | C++ Class Library | HTML5 JavaScript
Medical Web Viewer .NET
Multimedia
Direct Show .NET | C API | Filters
Media Foundation .NET | C API | Transforms
Supported Platforms
.NET, Java, Android, and iOS/macOS Assemblies
Imaging, Medical, and Document
C API/C++ Class Libraries
Imaging, Medical, and Document
HTML5 JavaScript Libraries
Imaging, Medical, and Document
Your email has been sent to support! Someone should be in touch! If your matter is urgent please come back into chat.
Chat Hours:
Monday - Friday, 8:30am to 6pm ET
Thank you for your feedback!
Please fill out the form again to start a new chat.
All agents are currently offline.
Chat Hours:
Monday - Friday
8:30AM - 6PM EST
To contact us please fill out this form and we will contact you via email.