Remove data from a control surface
int PtSurfaceRemoveData( PtWidget_t *widget, PtSurface_t *surface ); int PtSurfaceRemoveDataById( PtWidget_t *widget, unsigned char surface_id );
These functions remove user data from a control surface belonging to the given widget. They differ in the way they identify the control surface:
If, when the data was added, the len argument was nonzero, the copy of the data that was made is automatically freed, otherwise no deallocation takes place.
|Data is automatically removed when a control surface is destroyed.|
PtSurfaceAddData(), PtSurfaceAddDataById(), PtSurfaceGetData(), PtSurfaceGetDataById()
Control Surfaces chapter of the Photon Programmer's Guide