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02-06-2009
| #1 (permalink) |
| Vista Prof 32bit | ReadFile Win32 API not working under Vista Hi, I have a USB Touch screen that I have built a user-mode driver for. It has been written in VB6 and has been working fine under Windows XP. I recently decided to rewrite the application in Visual Basic.Net and C#. Both work fine under XP, but when I try the two Dot Net versions under Windows Vista neither works. I use CreateFile API to point to the kernel-mode driver and it returns a valid Handle. But ReadFile returns with zero bytes received. I have tried this with Visual Studio 2008 and DotNet framework 3.5 and Visual Basic Express 2005 and I am using Vista Business. ReadFile works OK to read text files but not the USB device. Any ideas greatly appreciated. Goblet |
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