d3d9.dllLockIndexBuffer
Microsoft DirectX 9.0 SDK Update (October 2004)

ID3DXPatchMesh::LockIndexBuffer Method


Lock the index buffer.

Syntax

HRESULT LockIndexBuffer(      

    DWORD flags,     LPVOID *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_NOSYSLOCK
  • 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_INVALIDCALLThe method call is invalid. For example, a method's parameter may have an invalid value.
E_OUTOFMEMORYMicrosoft 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.

See Also

D3DXCreatePatchMesh


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