# 4D_fWriteObjW(ObjType, ObjIndex) hash function
Sends the floating point value in the floating point register W to the nominated 4D object. The floating point data is converted to the 16-bit integer data expected by ViSi-Genie, so possible values lie between 0 and 65,535.
ObjType is the 4D systems Object. These are defined in the ViSi-Genie reference manual. ObjIndex is the object number of that particular type.
Executing this hash function will always result in one YieldTask.