The IDirectinputEffect::Download method places the effect on the device. If the effect is already on the device, then the existing effect is updated to match the values set by the IDirectInputEffect::SetParameters method.
HRESULT Download(void);
If the method succeeds, the return value is DI_OK or S_FALSE.
If the method fails, the return value may be one of the following error values:
| DIERR_NOTINITIALIZED |
| DIERR_DEVICEFULL |
| DIERR_INCOMPLETEEFFECT |
| DIERR_INPUTLOST |
| DIERR_NOTEXCLUSIVEACQUIRED |
| DIERR_INVALIDPARAM |
| DIERR_EFFECTPLAYING |
If the method returns S_FALSE, the effect has already been downloaded to the device.
It is valid to update an effect while it is playing. The semantics of such an operation are explained in the reference for IDirectInputEffect::SetParameters.
Windows NT/2000: Requires Windows 2000.
Windows 95/98: Requires Windows 95 or later. Available as a redistributable for Windows 95.
Header: Declared in dinput.h.
Import Library: Use dinput.lib.