Itcl - the [incr Tcl] extension

    }

    Tcl_SetHashValue(hPtr, imvPtr);

    *imvPtrPtr = imvPtr;
    return TCL_OK;
}

/* 
 * TODO: remove this if unused (seems to be internal API only),
 *       now superseded by ItclCreateMethodVariable.
 */
int
Itcl_CreateMethodVariable(
    Tcl_Interp *interp,       /* interpreter managing this transaction */
    ItclClass* iclsPtr,       /* class containing this variable */
    Tcl_Obj* namePtr,         /* variable name */
    Tcl_Obj* defaultPtr,      /* initial value */
    Tcl_Obj* callbackPtr,     /* code invoked when variable is set */
    ItclMethodVariable** imvPtrPtr)
                              /* returns: new methdovariable definition */
{
    ItclVariable *ivPtr;
    Tcl_HashEntry *hPtr;

    /*
     *  Search variable reference (ivPtr).
     */
    hPtr = Tcl_FindHashEntry(&iclsPtr->variables, (char *)namePtr);
    if (!hPtr || !(ivPtr = (ItclVariable*)Tcl_GetHashValue(hPtr))) {
        Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
            "variable name \"", Tcl_GetString(namePtr),
	    "\" is not declared in class \"",
            Tcl_GetString (iclsPtr->fullNamePtr), "\"",
            NULL);
        return TCL_ERROR;
    }

    /*
     *  Create method variable.
     */
    return ItclCreateMethodVariable(interp, ivPtr, defaultPtr, callbackPtr,
		imvPtrPtr);
}


/*
 * ------------------------------------------------------------------------
 *  Itcl_GetCommonVar()
 *
 *  Returns the current value for a common class variable.  The member
 *  name is interpreted with respect to the given class scope.  That