VB Migration Partner

KNOWLEDGE BASE - Forms and controls


Previous | Index | Next 

[PRB] Manually invoking the Paint event handler may not deliver the expected results

Under VB6, a method that works as the handler for the Paint event – e.g. the Form_Paint handler – can be also invoked manually to force the execution of a series of graphic methods.

This technique doesn’t work correctly in migrated project when double buffering is being used, because in this case the support library hasn’t prepared the drawing surface for those graphic methods.

The solution to this issue is quite simple: instead of manually invoking the Paint event handler, you indirectly fire the control’s Paint event by means of the Refresh or Invalidate methods that all .NET controls expose.

Previous | Index | Next 




Follow Francesco Balena on VB6 migration’s group on

LinkedIn





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.

newsletter



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