Question

I am maintaining an application which currently checks to see whether MS Access 2007 is installed. It does this by verifying that a registry key exists.

public bool IsAccess2007Installed()
{
    RegistryKey rootKey = Registry.ClassesRoot.OpenSubKey(@"Access.Application.12\shell\open\command", false);

    return rootKey != null;
}

How would I go about verifying whether MS Access 2010 is installed? Or better yet, how would I verify that MS Access 2007 or later is installed?

It is assumed that the user has administrator privileges.

Answer 1

You can check this key for a value (eg. Access.Application.12) instead.
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Access.Application\CurVer

So your line of code would be:

RegistryKey rootKey = Registry.ClassesRoot.OpenSubKey(@"Access.Application\CurVer", false);

if (rootKey == null) return false;

string value = rootKey.GetValue("").ToString();
int verNum = int.Parse(value.subString(value.indexOf("Access.Application.")));
if (value.StartsWith("Access.Application.") && verNum >= 12)
{ return true; }