Negative values represent errors and cannot be combined. The following table shows the values that the functions in the DirectDraw Display Driver Reference can return. For a list of the error codes that each function can return, see the function description.
| Value | Description |
|---|---|
| DD_OK | The request completed successfully. |
| DDERR_CURRENTLYNOTAVAIL | The display driver is in power management mode. |
| DDERR_EXCEPTION | An exception was encountered while performing the requested operation. |
| DDERR_INVALIDOBJECT | DirectDraw received a pointer that was an invalid DirectDraw object. |
| DDERR_INVALIDPARAMS | One or more of the parameters passed to the method are incorrect. |
| DDERR_SURFACEBUSY | Access to the surface is refused because the surface is locked by another thread. |
| DDERR_UNSUPPORTED | The operation is not supported. |
| DDERR_VERTICALBLANKINPROGRESS | A vertical blank is in progress. |
| DDERR_VIDEONOTACTIVE | The video port is not active. |
| DDERR_WASSTILLDRAWING | The previous blit operation that is transferring information to or from this surface is incomplete. |
| DDHAL_DRIVER_HANDLED | The request has been dealt with, however, no specific action may have been taken. |
| DDHAL_DRIVER_NOCKEYHW | No hardware exists for this request. |
| DDHAL_DRIVER_NOTHANDLED | The request has not been dealt with in any way. |
See Also
DirectDraw Display Driver Reference | DDHAL Callback Functions
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