VB Migration Partner

KNOWLEDGE BASE - Forms and controls

Previous | Index | Next 

[PRB] SmallChange property can’t be higher than LargeChange

The .NET ScrollBar control doesn’t accept a value for the SmallChange property that is higher than the LargeChange property. This is a substantial difference from the corresponding VB6 control, which has no similar limitations.

VB Migration Partner converts several VB6 scrollbar controls – namely, HScrollBar, VScrollBar, FlatScrollBar, WLHScroll, and WLVScroll – into a class that derives from either the HScrollBar or the VScrollBar .NET control. These controls behave much like the VB6 scrollbar, except for a couple details:

a)    The scrollbar might not reach it “max” position if the LargeChange property is assigned a value greater than 1.

b)    The SmallChange property can’t be higher than the LargeChange property.

These two problems are somewhat related. To work around problem a), the ScrollBar .NET control used by VB Migration Partner’s support library basically forces the LargeChange property to be equal to 1 (as explained in this article). As a consequence, also the SmallChange property is indirectly forced to be equal to 1. The simplest solution to problem b) is by setting the IgnoreLargeChange property to False and then ensuring that SmallChange property is lower than or equal than the LargeChange property:

'## Scroll1.WriteProperty IgnoreLargeChange, False
Previous | Index | Next 

Follow Francesco Balena on VB6 migration’s group on


Read Microsoft Corp’s official case study of a VB6 conversion using VB Migration Partner.

Code Architects and its partners offers remote and onsite migration services.

More details

Subscribe to our free newsletter for useful VB6 migration tips and techniques.


To learn more about your VB6 applications, run VB6 Analyzer on your source code and send us the generated text file. You will receive a detailed report about your VB6 applications and how VB Migration Partner can help you to quickly and effectively migrate it to .NET.

Get free advice

A fully-working, time-limited Trial Edition of VB Migration Partner allows you to test it against your actual code

Get the Trial

The price of VB Migration Partner depends on the size of the VB6 application, the type of license, and other factors

Request a quote

Migrating a VB6 application in 10 easy steps

Comparing VB Migration Partner with Upgrade Wizard

Migration tools: Feature Comparison Table

All whitepapers