IndexBuffer.Lock Method (Int32, Int32, LockFlags)

Artigo
10/15/2009

[This documentation is for preview only, and is subject to change in later releases. Blank topics are included as placeholders.]

Locks a range of index data and obtains a pointer to the index buffer memory.

Namespace: Microsoft.WindowsMobile.DirectX.Direct3D
Assembly: Microsoft.WindowsMobile.DirectX (in Microsoft.WindowsMobile.DirectX.dll)

Syntax

'Declaration
Public Function Lock ( _
    offsetToLock As Integer, _
    sizeToLock As Integer, _
    flags As LockFlags _
) As GraphicsStream
'Usage
Dim instance As IndexBuffer
Dim offsetToLock As Integer
Dim sizeToLock As Integer
Dim flags As LockFlags
Dim returnValue As GraphicsStream

returnValue = instance.Lock(offsetToLock, _
    sizeToLock, flags)

public GraphicsStream Lock(
    int offsetToLock,
    int sizeToLock,
    LockFlags flags
)

public:
GraphicsStream^ Lock(
    int offsetToLock, 
    int sizeToLock, 
    LockFlags flags
)

member Lock : 
        offsetToLock:int * 
        sizeToLock:int * 
        flags:LockFlags -> GraphicsStream

Parameters

offsetToLock
Type: System.Int32
Offset into the index data to lock, in bytes.

sizeToLock
Type: System.Int32
Size of the index data to lock, in bytes. To lock the entire index buffer, specify 0 for the sizeToLock and offsetToLock parameters.

flags
Type: Microsoft.WindowsMobile.DirectX.Direct3D.LockFlags
Zero or more LockFlags that describe the type of lock to perform. For this method, the valid flags are:
- Discard field
- NoDirtyUpdate field
- NoOverwrite field
- ReadOnly field

Return Value

Type: Microsoft.WindowsMobile.DirectX.GraphicsStream
A GraphicsStream that represents the locked index buffer.

Exceptions

Exception	Condition
InvalidCallException	The method call is invalid. For example, a method's parameter might contain an invalid value.

Remarks

A call to the DrawPrimitives method on a Device will succeed only if there is no outstanding lock count on any currently set index buffer.

The Discard and NoOverwrite fields for a LockFlags are valid only with buffers created with the Dynamic member of the Usage enumeration.

.NET Framework Security

Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.

Platforms

Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Version Information

.NET Compact Framework

Supported in: 3.5, 2.0

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