ID3DXPatchMesh::LockIndexBuffer Method

Lock the index buffer.

Syntax

HRESULT LockIndexBuffer(      

    DWORD Flags,
    VOID **ppData
);

Parameters

Flags
[in] Combination of zero or more locking flags that describe the type of lock to perform. For this method, the valid flags are:
D3DLOCK_DISCARD
D3DLOCK_NO_DIRTY_UPDATE
D3DLOCK_NO_SYSLOCK
D3DLOCK_READONLY
For a description of the flags, see D3DLOCK.
ppData
[out, retval] VOID* pointer to a memory buffer containing the returned index data.

Return Value

If the method succeeds, the return value is D3D_OK.
If the method fails, the return value can be one of the following values.
D3DERR_INVALIDCALL The method call is invalid. For example, a method's parameter may have an invalid value.
E_OUTOFMEMORY Microsoft?Direct3D?could not allocate sufficient memory to complete the call.

Remarks

The index buffer is usually locked, written to, and then unlocked for reading. Patch mesh index buffers are 16-bit buffers.

D3DERR_INVALIDCALL	The method call is invalid. For example, a method's parameter may have an invalid value.
E_OUTOFMEMORY	Microsoft?Direct3D?could not allocate sufficient memory to complete the call.