D3DSTATE_OVERRIDE(type) ((DWORD) (type) + D3DSTATE_OVERRIDE_BIAS)
Overrides the state of the rasterization, lighting, or transformation module. Applications can use this macro to lock and unlock a state.
·No return value.
type
State to override. This parameter should be one of the members of the D3DTRANSFORMSTATETYPE, D3DLIGHTSTATETYPE, or D3DRENDERSTATETYPE enumerated types.
An application might, for example, use the STATE_DATA macro (defined in the D3dmacs.h header file in the Misc directory of the DirectX 2 SDK sample code) and D3DSTATE_OVERRIDE to lock and unlock the D3DRENDERSTATE_SHADEMODE render state:
// Lock the shade mode.
STATE_DATA(D3DSTATE_OVERRIDE(D3DRENDERSTATE_SHADEMODE), TRUE, lpBuffer);
// Work with the shade mode and unlock it when read-only status is not required.
STATE_DATA(D3DSTATE_OVERRIDE(D3DRENDERSTATE_SHADEMODE), FALSE, lpBuffer);
For more information about overriding rendering states, see States and State Overrides.