Determining If An Object Has Been Set

Determining If An Object Has Been Set

VB4 provides lots of new capabilities to use objects. Unfortunately,all of them require the object to be set beforehand, which isn’talways feasible. VB provides no way to see if an object has beenset. The only way of checking is to pass the object to a functionand attempt to access it. If it hasn’t been set, an error (number91) will occur.

For example:

 Public Function IsSomething(o As _        Object) As LongDim j As Long        Err.Clear        On Error Resume Next        If TypeOf o Is TextBox Then                j = 1                 'just a mindless test                'to see if we get an error        End If        If Err.Number = 91 Then        'error 91 = object not set                IsSomething = False                ElseIf Err.Number = 0 Then                        IsSomething = True                Else                        Err.Raise Err.Number                        'if some other error happened, raise it        End If        On Error GoTo 0End Function
Share the Post:
XDR solutions

The Benefits of Using XDR Solutions

Cybercriminals constantly adapt their strategies, developing newer, more powerful, and intelligent ways to attack your network. Since security professionals must innovate as well, more conventional endpoint detection solutions have evolved

AI is revolutionizing fraud detection

How AI is Revolutionizing Fraud Detection

Artificial intelligence – commonly known as AI – means a form of technology with multiple uses. As a result, it has become extremely valuable to a number of businesses across

AI innovation

Companies Leading AI Innovation in 2023

Artificial intelligence (AI) has been transforming industries and revolutionizing business operations. AI’s potential to enhance efficiency and productivity has become crucial to many businesses. As we move into 2023, several

data fivetran pricing

Fivetran Pricing Explained

One of the biggest trends of the 21st century is the massive surge in analytics. Analytics is the process of utilizing data to drive future decision-making. With so much of

kubernetes logging

Kubernetes Logging: What You Need to Know

Kubernetes from Google is one of the most popular open-source and free container management solutions made to make managing and deploying applications easier. It has a solid architecture that makes

ransomware cyber attack

Why Is Ransomware Such a Major Threat?

One of the most significant cyber threats faced by modern organizations is a ransomware attack. Ransomware attacks have grown in both sophistication and frequency over the past few years, forcing

data dictionary

Tools You Need to Make a Data Dictionary

Data dictionaries are crucial for organizations of all sizes that deal with large amounts of data. they are centralized repositories of all the data in organizations, including metadata such as