VB Migration Partner

KNOWLEDGE BASE - Forms and controls

Previous | Index | Next 

[HOWTO] Define a more reliable Ambient.UserMode property

We have found that the the Ambient.UserMode property may mistakenly return the value True even if the UserControl is currently in design-mode. This behavior is a consequence of what .NET considers as “design-time” and in fact it is an issue that also affects developers who author .NET custom controls.

The VB6Utils class exposes a property named IsDesignMode, which returns True when the control is in design-time mode and is more reliable than the Ambient.UserMode property. Because the two properties have an opposite meaning, you have to prefix a Not operator when performing a global search-and-replace:

     '## project:PostProcess "\bAmbient\.UserMode", "(Not VB6Utils.IsDesignMode)"
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