VB Migration Partner

KNOWLEDGE BASE - Forms and controls


Previous | Index | Next 

[PRB] Form_Load events in default form instances

When using a default form instance the behavior of migrated code differs from VB6: under VB6, the Load event for such forms fire only once; conversely, in migrated .NET code the Load event fires any time the form is showed.

If preserving the original VB6 behavior is crucial, you should add a boolean flag to discern between the first and subsequent event invocation, as in this example:

    ' VB.NET
    Private m_FormShowed As Boolean

    Private Sub Form_Load() Handles MyBase.Load
	    If m_FormShowed Then Exit Sub
	    m_FormShowed = True
	    ' ...
    End Sub
    // C#
    private bool m_FormShowed;

    private void Form_Load() 
    {
	if (m_FormShowed) 
	     return;
          m_FormShowed = true;
	// ...
    }
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