We would like to store some additional data in appointments, and access them from EWS and a custom form too, so that our application could access the same data which the users would be able to access and edit via a graphical form in outlook.
EWS Java is working more or less properly (the java lib needs some workarounds), we are able to store and retrieve extended properties. We created our own UUID, and the ExtendedPropertyDefinition using the UUID, etc.
The problem is accessing those using an outlook form. By form, I mean a generic graphical form, and honestly, I did not find any source which explained, if we should use a custom from or an add-in, what are the differences between those, and if there is an other way to acheive what I described above. Please point me towards such documentation if it even exists.
As far as I understand, there are so called custom forms, which can be scripted with VBScript. Is this correct? Can the custom form be scripted using an other language?
Can you access the extended properties described above using VBScript? I did not find any resource describing this, but I did not go through all the available resources, I guess.
We would like not to develop an add-in if not necessary, so first I would like some advice using custom forms and VBScript.

Thank you.

Hi,

Based on my research, it seems that if we want to use custom form in Outlook, it need to do it with VSTO.

Similar case for reference:

http://social.msdn.microsoft.com/Forums/vstudio/en-US/b00271c3-669e-4e5f-a1e7-65b4f1262a08/access-outlook-custom-form-data-field-from-vsto

And for how to create custom form, please refer to the following link:

http://office.microsoft.com/en-in/outlook-help/tutorial-creating-and-distributing-custom-forms-with-outlook-HA001210610.aspx