Registry Access on 64 bit OS
in [Visual Objects]
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From: Geoff Schaller on 21 May 2010 08:25 Hi Folks. For anyone like me who suddenly found a need to retrieve registry entries on a 64 bit OS from a VO application, there is an issue. By default, VO and other 32 bit apps are directed to the WOW6432NODE hive in order to keep them separate to 64 bit apps. However an app we were working on needed to retrieve keys from the native hive of the OS. In other words, the 64 bit hive for 64 bit and the native hive otherwise. All you have to do is provide a mask of 0x0100 which has the lovely define of KEY_WOW64_64KEY in Dot Net. For example, the routine way to open a registry key should be amended like this: METHOD KeyExists(s_SubKey AS STRING) AS LOGIC PASCAL CLASS GCSRegistryClass // test the key by attempting to open it LOCAL li_Error AS LONG LOCAL dw_KeyHandle AS DWORD LOCAL s_Full_SubKey AS STRING LOCAL lResult AS LOGIC s_Full_SubKey := SELF:Build_Full_SubKey(s_SubKey) li_Error := RegOpenKeyEx( ; SELF:hKey, ; // hKey AS PTR String2Psz(s_Full_SubKey), ; // lpSubKey AS PSZ 0, ; // ulOPtions AS DWORD SELF:mask+KEY_QUERY_VALUE, ; // samDesired AS DWORD @dw_KeyHandle ; // phkResult AS PTR ) // AS LONG PASCAL:ADVAPI32.RegOpenKeyExA#149 IF li_Error == ERROR_SUCCESS RegCloseKey(dw_KeyHandle) lResult := TRUE ENDIF RETURN lResult ....just in case someone was interested. Cheers, Geoff
From: Ginny Caughey on 21 May 2010 12:28 Geez Geoff, why not do it in C#? -- Ginny Caughey www.wasteworks.com
From: Philippe Mermod on 21 May 2010 13:29 Cuz' he likes VO :-) -- Phil Mermod Crystal Reports Library for Visual Objects http://www.pkl.ch/dev/ Ginny Caughey wrote: > Geez Geoff, why not do it in C#?
From: Ginny Caughey on 21 May 2010 16:33 He likes C# too, and it's a lot easier to do some things in C#. You don't have to use only one language you know. ;-) It's not being disloyal or anything to use the best tool for the job at hand. -- Ginny Caughey www.wasteworks.com
From: Geoff Schaller on 21 May 2010 21:08
Hi Ginny. This is a VO app and it is 15 lines of code :-) In this case there is no benefit doing it in C# and in fact the issue is identical. C# has the exact same problem. But here we already have a pre-coded template in VO for these registry functions so it saves a COM reference etc. Cheers, Geoff "Ginny Caughey" <ginny.caughey.online(a)wasteworks.com> wrote in message news:4bf6b42f$0$13573$c3e8da3(a)news.astraweb.com: > Geez Geoff, why not do it in C#? > > -- > > Ginny Caughey > www.wasteworks.com |