1. Use an ArcSDE connection file created in ArcCatalog (or created programmatically with IWorkspaceFactory.Create) to set a path string to the input feature class. 2. Use IGPUtilities::.openFeatureClassFromString() to open this feature class and set it as Input Features parameter.String pathToInputFC = "C:/dsg/Connection to firestorm.sde/MAP.wind";IGPUtilities gpUtil = (GPUtilities)context.createObject(GPUtilities.getClsid());IFeatureClass ifc = gpUtil.openFeatureClassFromString(pathToInputFC);String output = "C:/dsg/usa.gdb/output";String distance = "10;20"; IVariantArray params = (IVariantArray) context.createObject(VarArray.getClsid());params.add(ifc); params.add(output);params.add(distance);gp.execute(modelName, params, null);