Return Codes for Direct3D Driver Callbacks

The following table lists values that can be returned by the Direct3D Driver-Supplied Functions. The DDHAL_DRIVER_Xxx values actually are returned in the DWORD return value. The D3D_OK value, D3DHAL_Xxx values, and D3DERR_Xxx error codes are returned in the ddrval member of the structure to which the particular function's parameter points.

For specific error codes that each function can return, see the function and structure descriptions in the reference section. Refer to Direct3D header files d3d.h and d3dhal.h for a complete listing of error codes and return values (also, d3d8.h and d3d9.h for DirectX versions 8.0 and 9.0). Note that error codes are represented by negative values and cannot be combined.

A function in a Direct3D driver must return one of the two return codes: DDHAL_DRIVER_HANDLED or DDHAL_DRIVER_NOTHANDLED. If the driver returns DDHAL_DRIVER_HANDLED, then it must also return either D3D_OK or one of the values listed in d3d.h or d3dhal.h. A function in a Direct3D driver can return the values in the following table. These values are defined in d3d.h and d3dhal.h.

Value	Meaning
D3D_OK (defined as DD_OK)	The request completed successfully.
D3DHAL_CONTEXT_BAD	The context that was passed in was not valid.
DDHAL_DRIVER_HANDLED	The driver has performed the operation and returned a valid return code for that operation in the ddrval member of the structure passed to the driver's callback. If this code is D3D_OK, Direct3D proceeds with the function. Otherwise, Direct3D returns the error code provided by the driver and aborts the function.
DDHAL_DRIVER_NOTHANDLED	The driver has no comment on the requested operation. If the driver is required to have implemented a particular callback, Direct3D reports an error condition. Otherwise, Direct3D handles the operation as if the driver callback had not been defined by executing the Direct3D device-independent implementation. Direct3D typically ignores any value returned in the ddrval member of that callback's parameter structure.
D3DHAL_OUTOFCONTEXTS	There are no more contexts left in this process.
D3DERR_UNSUPPORTEDCOLOROPERATION	The color operation is not supported.