If an InvalidActiveXStateException Error is Received

This error is due to the ActiveX Control not being completely initialized when the textBox1_TextChanged event is called as the form loads. This behavior is by design in VS.NET and is largely due to the relative slowness of calling ActiveX controls in the managed code environment.

The workaround is to handle the error using a try|catch statement and then re-attempt the offending code after the component has been completely initialized.

An example of the try | catch in VB would be:

    Try
    AxBarCode1.DataToEncode = TextBox1.Text
    Catch ex As AxHost.InvalidActiveXStateException
    End Try
 

• "A required file, MSVBVM60.DLL was not found" error when running Barcode Image Generator.
• "Out of Memory Error" with Linear Barcode ActiveX Control on XP when creating many barcodes
• "Out of Memory Error" using Barcode ActiveX Control on Office 97 Products
• "Type 'IDAutomation.Windows.Forms.LinearBarCode.Barcode' is not defined." or similar errors
• "Name 'IDAutomation' is not declared" or similar errors

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