Sends a hardware-specific command to the device.


func FFDeviceEscape(_ deviceReference: FFDeviceObjectReference!, _ pFFEffectEscape: UnsafeMutablePointer<FFEFFESCAPE>!) -> HRESULT



An opaque reference handle to a device object. This is obtained from a previous call to FFCreateDevice.


Pointer to FFEFFESCAPE structure that describes the command to be sent. On success, the cbOutBuffer member contains the number of bytes of the output buffer used.

Return Value

If the method succeeds, the return value is FF_OK. If the method fails, the return value can be one of the following error values:




Because each driver implements different escapes, it is the application's responsibility to ensure that it is sending the escape to the correct driver.

See Also


func FFCreateDevice(io_service_t, UnsafeMutablePointer<FFDeviceObjectReference?>!) -> HRESULT

Creates a new API device object from an OS object in preparation to use the device for force feedback.

func FFDeviceReleaseEffect(FFDeviceObjectReference!, FFEffectObjectReference!) -> HRESULT

Disposes of an API effect object created with FFDeviceCreateEffect.

func FFEffectDownload(FFEffectObjectReference!) -> HRESULT

Places the effect on the device. If the effect is already on the device, the existing effect is updated to match the values set by the FFEffectSetParameters method.

func FFEffectStart(FFEffectObjectReference!, UInt32, FFEffectStartFlag) -> HRESULT

Begins playing an effect. If the effect is already playing, it is restarted from the beginning. If the effect has not been downloaded or has been modified since its last download, it is downloaded before being started. This default behavior can be suppressed by passing the FFES_NODOWNLOAD flag.

func FFEffectUnload(FFEffectObjectReference!) -> HRESULT

Removes the effect from the device. If the effect is playing, it is automatically stopped before it is unloaded.

func FFIsForceFeedback(io_service_t) -> HRESULT

Used to determine if a particular device provided by HID Manager is a force feedback device.

func FFReleaseDevice(FFDeviceObjectReference!) -> HRESULT

Disposes of an API device object created with FFCreateDevice.