VB.Net and OmniPage Pro

[Gianluca]

Hi,

I'm having a problem with an application that I developed in VB.Net.
This application has worked well until I installed OmniPage 12 on my
machine.
After that, when I open a certain window of my application I obtain
the following error message:

An unhandled exception of type ‘System.ArgumentException' occurred in
system.windows.forms.dll
Additional information: ‘-178871180 is not a valid value for length'

I discovered that OmniPage loads at Windows startup an executable
called 'opware12.exe'. Killing that process my application works fine.

Moreover, debugging the application, I discovered that the problem
reside in a class inherited from ComboBox that adds some feature to
the standard combo. I use this 'enhanced' combo in the window that
generates the error.

In the code of a property that I have added to my class I use the
following code to deselect the combo text:
Me.SelectionStart = 0 '<== this row throws the exception
Me.SelectionLength = 0

Instead it works well, also with OmniPage loaded, if I use this code:
Me.Select(0,0)

Someone has experienced this kind of problem, and can give me an
explanation?

Thanks in advance for your help

Gianluca

 

[Bernie Yaeger]

Hi Gianluca,

Now that is weird.

A couple of questions:
1. is the enhanced combobox managed code?
2. have you contacted the OmniPage Pro developers?
3. has MS approved OmniPage Pro for installation on XP's etc?

Bernie Yaeger

 

[Gianluca]

Hi Bernie,

The entire software is written in managed code, using Visual Basic.Net.
I don't know if MS approved OmniPage, but, as stated in the system
requirements, it can run also on Windows XP, but I haven't tried on Windows
XP without service pack 2.
By now, it seems that the workaround is working, but if I found other
problems I will try to contact the OmniPage support.

Thanks,
Gianluca