Force Tri-State Checkbox Cycling

The CheckBox control in VB supports three positions: Checked, Unchecked, and Grayed. Unfortunately, the default behavior for the control is to cycle between Checked and Unchecked. To set it to Grayed, you must do it programatically. This code shows you how to cycle between the three positions (the order is Checked->Unchecked->Grayed->Checked …):

 Private Sub Check1_Click()Static iState As CheckBoxConstantsStatic bUserClick As Boolean' Trap if the user clicked on the control' or if the event was fired because you' changed the value belowbUserClick = (iState <> Check1.Value)' Prevents you from entering an infinite' loop and getting an Out of Stack Space errorIf bUserClick ThenSelect Case iStateCase vbCheckediState = vbUncheckedCase vbUncheckediState = vbGrayedCase vbGrayediState = vbCheckedEnd Select' This will raise another click event but' your boolean check prevents you from loopingCheck1.Value = iStateEnd IfEnd Sub
Share the Post:
Share on facebook
Share on twitter
Share on linkedin

Overview

The Latest

Top 5 B2B SaaS Marketing Agencies for 2023

In recent years, the software-as-a-service (SaaS) sector has experienced exponential growth as more and more companies choose cloud-based solutions. Any SaaS company hoping to stay ahead of the curve in this quickly changing industry needs to invest in effective marketing. So selecting the best marketing agency can mean the difference

technology leadership

Why the World Needs More Technology Leadership

As a fact, technology has touched every single aspect of our lives. And there are some technology giants in today’s world which have been frequently opined to have a strong influence on recent overall technological influence. Moreover, those tech giants have popular technology leaders leading the companies toward achieving greatness.

iOS app development

The Future of iOS App Development: Trends to Watch

When it launched in 2008, the Apple App Store only had 500 apps available. By the first quarter of 2022, the store had about 2.18 million iOS-exclusive apps. Average monthly app releases for the platform reached 34,000 in the first half of 2022, indicating rapid growth in iOS app development.