ScriptableWizard.isValid  

var isValid : boolean

Description

Allows you to enable and disable the wizard create button, so that the user can not click it.

See Also: ScriptableWizard.OnWizardUpdate

The finish button gets disabled until the user sets the number to 5

// C#
// Asks the user to set the var "Number" to 5, if is not set to 5
// the "Finish" button will not be reachable

using UnityEngine;
using UnityEditor;
    
public class isValidScriptableWizard : ScriptableWizard {
    public int number = 0;
    [MenuItem ("Example/Show isValid Usage")]
    static void CreateWindow() {
        ScriptableWizard.DisplayWizard(
            "isValid boolean example", 
            typeof(isValidScriptableWizard), 
            "Finish");
    }
    void OnWizardUpdate() {
        helpString = "Set The number to 5 and press finish";
        if(number != 5) {
            errorString = "The number has to be set to 5!";
            isValid = false;
        } else { 
            errorString = "";
            isValid = true;
        }
    }
}