Visual Studio 2010 64bit cann't connect Oracle database through 64bit ODBC Driver

Hi,
I am developing an 64bit And-In software. My OS is windows7 64bit Ultimate. Developer tool is
Microsoft  Visual Studio 2010 Ultimate 64bit any-CUP.
Server is SUN server and Oracle database 10.2.0.5 64bit enterprise edition.
I have installed instantclient-odbc-win64-10.2.0.5 on my computer.
I am able to connect through the command line sqlplus user/pass@server.
In date source(c:\windows\system32\odbcad32.exe), ODBC Driver connection successful.
But in VS2010 C#, use Tools -> Connect Database,I get an error 193 (Oracle in
instantclient10_2,c:\ora10_64\SQORA32.dll) cann't be loaded.
SQORA32.dll is 32bit ODBC Driver or 64bit ODBC Driver?
How can I connect database with vs2010 64bit?
Regards

There is no Visual Studio 2010 Ultimate 64bit as far as I know.  It's a 32 bit app.    Generally you'd need to install a 32 bit client to use the 32 bit tools.
Hope it helps,
Greg

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