Get first chance exception when calling ReleaseDriver()

[zwi...@gmail.com]

Hi,

I'm trying to run the Visual C 6 example in a VS2008 C++ environment.
Every time the code encounters a first chance exception ("An invalid handle was specified") when calling "ReleaseDriver()". It seems that something happens when the "FreeLibrary(HwndDriver)" try to unload the DLL file.

So I test a simple win32 console:

#include "stdafx.h"
#include "VxmDriver.h"

int _tmain(int argc, _TCHAR* argv[])
{
HINSTANCE HwndDriver = LoadLibrary("VxmDriver.dll");
FreeLibrary(HwndDriver);
return 0;
}
#######################

But the code throws the same exception when calling FreeLibrary to unload DLL as well.

Is there a way to solve this problem?

Thanks!

[Velmex Suppt]

What value do you get for HwndDriver when you call

HwndDriver = LoadLibrary("VxmDriver.dll");

???

Best Regards,
Velmex Support
Velmex, Inc.

"Positioning Systems for Science and Industry"
Tel: 585-657-6151 / Toll Free: 800-642-6446 / Fax: 585-657-6153
www.velmex.com
www.velmexcontrols.com

-------- Original Message --------

Subject:	Get first chance exception when calling ReleaseDriver()
Date:	Tue, 23 Sep 2014 12:43:47 -0700 (PDT)
From:	zwi...@gmail.com
Reply-To:	velmex-...@googlegroups.com
To:	velmex-...@googlegroups.com

Hi,

I'm trying to run the Visual C 6 example in a VS2008 C++ environment.
Every time the code encounters a first chance exception ("An invalid handle was specified") when calling "ReleaseDriver()". It seems that something happens when the "FreeLibrary(HwndDriver)" try to unload the DLL file.

So I test a simple win32 console:

#include "stdafx.h"
#include "VxmDriver.h"

int _tmain(int argc, _TCHAR* argv[])
{
     HINSTANCE HwndDriver = LoadLibrary("VxmDriver.dll");
     FreeLibrary(HwndDriver);
     return 0;
}
#######################

But the code throws the same exception when calling FreeLibrary to unload DLL as well.

Is there a way to solve this problem?

Thanks!

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[zwi...@gmail.com]

Hi,

It returns HwndDriver Value 0x001c0000{unused=678477}.
Thanks.

Best

在 2014年9月23日星期二UTC-7下午12时59分55秒，Velmex Suppt写道：