windows mobile 6.1 bar code problem with .Net compact 3.5 application

We have a .Net compact 3.5 applic开发者_开发知识库ation running on windows mobile 6.1 platform. We run it on Intermec CN50 PDA.

Today we encountered a weird problem. The bar code functionality stops working after we logged in our application for no reason. Even weirder, the bar code functionality will stop working with ALL other apps after this even after we quit our app and checked on task manager to make sure it's completely off.

So the bottom line is, the bar code reader works until we starts our .Net 3.5 compact app and then stop working afterward (a reboot is required to make it work again)

I am puzzled on how a normal application can 'disable' a bar code functionality even after it no longer runs.

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Does this happen with any CF app (like a Hello World app) or just yours? If you app is explicitly calling the platform and telling it to turn off the barcode reader, it would certainly give the behavior you see.

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are you familiar with the vwconfig.ini file on the CN50? It has some interesting settings for bar code scanning.