GetProfileInt() is failing - winapi

In my application, I am using the following Win32 API to before loading the mapi32.dll.
win32 API: ::GetProfileInt(_T("MAIL"), _T("MAPI"), 0);
This API is consistently failing on Windows 8.1 Italian 64-Bit PC.
But, this API is succeeding on all other PCs like Windows 8.1 English(US) 64-Bit PC, Windows 8.1 Japanese 64-Bit PC.
Kindly provide your kind help for fixing the above issue.

To find MAPI32.dll look in either of these paths:
C:\Windows\SysWOW64\mapi32.dll
C:\Windows\System32\mapi32.dll
or use this
GetWindowsDirectory(buf, 260);
lstrcat(buf, TEXT("\\SysWOW64\\mapi32.dll"));
...
To access old win.ini settings, look in this registry key:
HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\IniFileMapping\win.ini
But there is probably nothing there about MAPI, it's about 20 years out of date.

The code you originally got this from was probably very old and is no longer supported. If you read the documentation for GetProfileInt, you'll see that its purpose is to support 16-bit applications.
I recommend removing the call. I have also observed it failing on Windows 7 machines while succeeding on Windows 10 machines. I think the more appropriate calls are to use SearchPath(nullptr, L"MAPI32.DLL", nullptr, 0, nullptr, nullptr) to see if MAPI32.DLL would even be found. An alternative is to just attempt the LoadLibrary(L"MAPI32.DLL") and check the returned handle.
An even better solution might be to change your code to call MAPISendMailHelper as it will do the LoadLibrary, GetProcAddress, etc. for you.

Related

missing ADO connection functionality when running old vb6 app on win 2016

*THIS HAS BEEN EDITED, SEE BOTTOM. I CHANGED THE TITLE TO BETTER REFLECT THE PROBLEM.**
I have an old vb6 application that I put on a windows 2016 server and been having issues with dependency files. I ran process monitor and started putting the dll files in the locations where it is looking at, most of them have cleared up.
I'm getting one that I cant find on the old win 2000 box or anywhere else: wow64log.dll
Where can I can get this file? I attached pics of proc mon and the list of dependencies that the app is requiring. any direction would be appreciated. third pic is the actual error when trying to open the app. edit added the dependency walker screen shot
EDIT***
so I have narrowed down the issue and it boils down to an ADO connection. I cant seem to connect on windows server 2016 using ADO. I suspect it has something to do with the connection string, but what baffles me is why does this work on a win 10,1803 box and not on windows server 2016 1607 ?
this is basically my issue - https://social.msdn.microsoft.com/Forums/SECURITY/en-US/f1eee40b-6ab2-445f-a361-ae965439273a/run-time-error-214746725980004005-for-using-adodbconnection?forum=isvvba
I suspect that this is not an actual error in the runtime of your program, If you are only looking at Procmon, be aware that it shows a lot of stuff and sometimes not all the "errors" there are really relevant. For instance, it will often show how Windows functions look in a long list of search paths, each failing in turn, before that actual location of a DLL is detected.
In this case, it seems most likely that a missing wow64log.dll is harmless and apparently, totally normal.
"WoW64" is the Windows subsystem which runs 32 bit programs inside the 64 bit operating system. ("WoW" stands for "Windows-on-Windows".)
According to the reference WoW64 Internals describing how this subsystem is initialized:
wow64!ProcessInit
...
It … tries to load the wow64log.dll from the constructed system
directory. Note that this DLL is never present in any released
Windows installation (it’s probably used internally by Microsoft for
debugging of the WoW64 subsystem). Therefore, load of this DLL will
normally fail. This isn’t problem, though, because no critical
functionality of the WoW64 subsystem depends on it.
Although that article is talking about the ARM64 architecture (which AFAIK is not what most PCs would be using) it sounds like much of the WoW64 system is similar to normal PCs.

GetProcAddress fails on Win 7 even though the DLL actually exports the function (works on Win 10)

I have a 32-bit application and I have a problem with it on Windows 7 x64. I'm loading a DLL. LoadLibraryW succeeds and the subsequent call to GetProcAddress fails with the error code 127 ("procedure not found" or something like that).
The funny part is that I know for a fact the function is exported by the DLL. I made no typos in the GetProcAddress call. I can see the function with Depends.exe and DllExp.exe. The exact same application binary successfully loads the function from the exact same DLL on Windows 10 x64, but not on Windows 7 x64.
Some more details: the library is dbghelp.dll and the "missing" function is MiniDumpWriteDump.
And the fun bit: dbghelp.dll provides API for inspecting the modules loaded into the process and for enumerating functions exported by those modules. So, first I took the HMODULE for this problematic dbghelp.dll and ran
auto ptrSymInitialize = (decltype(&SymInitialize))GetProcAddress(hDbgHelpDll, "SymInitialize");
It worked, this function did load! Then I loaded SymEnumSymbols, written the enumerator callback and finally ran the following to enumerate all the functions in this very `dbghelp.dll":
ptrSymEnum(GetCurrentProcess(), 0, "dbghelp*!*", &Enumerator, nullptr);
And what do you know, MiniDumpWriteDump is, in fact, listed there. Go figure.
Thoughts?
I can see your intent is to use MiniDumpWriteDump. We also make minidumps in our product, and I'm the one to support this.
I would suggest against using dbghelp.dll supplied with OS. First, they tend to be outdated and not support the latest minidump capabilities, which you would want to have. Second, they have proven to be rather unreliable. I believe they simply lack too many bugfixes.
What I found to work quite well is to take dbghelp.dll from Debugging Tools for Windows package (currently part of Windows SDK) and ship it along with our product. This way, I can be sure minidumps will have all the latest features and it works reliably on all OS. It has been some 8 years now, with OS ranging from WinXP to Win10, and I didn't have any issues.
I'm not exactly sure which version of SDK I used to extract the currently used dbghelp.dll, probably it was Win7 SDK. I simply didn't have a reason to update since then. However, we do use Debugging Tools for Windows package from Win10 SDK on Win7 without any issues, so I guess you can use Win10 version as well.
that's exactly what I've been doing, and I didn't bring dbgcore.dll
This was just a plain bad idea. Microsoft makes no effort to make the DLLs that are included with the OS to be backwards compatible. They don't have to. In their implementation, only the interface needs to be compatible. They do take advantage of new capabilities or design changes to improve the implementation.
Like you saw here, a side-effect of the MinWin project. There is no reasonable guess where that ended, if it happens to work now on the Win7 machine then you got lucky. Maybe you won't be so lucky on a Win7 machine without SP1, maybe some minwin glue DLLs are missing on a clean install, maybe the minidump itself is affected negatively some way. Impossible to predict.
So never do this. Afaik you should not be doing this at all, a Win7 machine already has dbghelp.dll available. Not 100% sure, it has been too long and Win7 is rapidly turning into the new XP. If you find it to be necessary then always use the redistributable version. Included with the SDK's Debugging Tools for Windows. Copy it into the same folder as the EXE that needs it so you don't mess up a machine.

User Mode Scheduler (UMS) returns ERROR_NOT_SUPPORTED

I want to use the Windows User-Mode Scheduler API but every sample C or C++ I have found in the internet fails. Invariably I get ERROR_NOT_SUPPORTED.
My Computer is running Windows 10 Pro 64-bits in an x64 processor. I am using VS2015 and the application is an x64 console application.
Notably not every call fails, in the 4 samples I've tested either
EnterUmsSchedulingMode
CreateRemoteThreadEx
Fail with ERROR_NOT_SUPPORTED. Those are necessary to get things going, but for example CreateUmsCompletionList or GetUmsCompletionListEvent do not.
The API is not trivial to use but I am having a hard time believing all of them are wrong.
I've debugged a bit what happens inside EnterUmsSchedulingMode and it seems that things go wrong when calling NtSetInformationThread inside RtlpAttachThreadToUmsCompletionList although of this I am less sure.
Here is one and here is another of the samples I've tried.
If you're on a pre-Ivy Bridge processor UMS will fail to work due to a potential security problem where an LDT is created on x64. The problem can be avoided with Ivy Bridge and a Windows 10 (and ostensibly Server 2016) update simply disables the UMS feature if the processor doesn't have access to the Ivy Bridge feature.
More info here: http://www.alex-ionescu.com/?p=340

Visual Studio C++ RegOpenKeyEx() registry Access is denied error Windows 7 64 bit

I'm running a C++ program (which works great on 32 bit Win XP) on Windows 7 64 bit in debugger under Visual Studio 2010 and I am unable to open an existing registry key with the following code:
#define ACCESS (KEY_WRITE | KEY_QUERY_VALUE | KEY_ENUMERATE_SUB_KEYS)
HKEY hKey;
long dwErrorCode = ::RegOpenKeyEx(HKEY_LOCAL_MACHINE, "Software\MYTHING", 0, ACCESS|KEY_WOW64_64KEY, &hKey);
if (dwErrorCode != ERROR_SUCCESS)
{
// display error message
}
The error code returned is: 5 with the system message being "Access is Denied".
This does work if I run the Visual Studio 2010 as Admin, however I'd rather not have to do that. Can anybody offer a suggestion?
Update: I forgot to mention, what I am doing here is porting legacy code from Windows XP. As such, I don't have the option of changing the fundamental structure of how this software was written. Since the legacy code uses the registry, that is what the ported code must do also.
Also, I would rather not make changes to my specific computer -- since that means I would have to change every computer that I want to run this on. This could get messy as there are a lot of machines affected. For example, I don't want to turn off UAC for the entire machine.
Further update: I haven't found a solution that I'm happy with. Have decided to ignore error code 5 for purposes of debugging and that seems to be working well enough for now. I'm trying to understand how standard apps like Word, Firefox, etc appear to be using the registry for all kinds of settings and yet are not elevated nor do I have to give them special permissions to make changes to the registry?
Ok, I found the answer to my question so I'll post it here in case anybody else needs it for future reference. This thread turned out to be helpful even though it is actually on the topic of C#:
http://social.msdn.microsoft.com/Forums/da-DK/netfx64bit/thread/92f962d6-7f5e-4e62-ac0a-b8b0c9f552a3
Basically, I needed to change my permission to read the 32 bit registry instead of the 64 bit one like so:
HKEY hKey;
long dwErrorCode = ::RegOpenKeyEx(HKEY_LOCAL_MACHINE, "Software\MYTHING", 0, ACCESS|KEY_WOW64_32KEY, &hKey);
if (dwErrorCode != ERROR_SUCCESS)
{
// display error message
}
Voila, everything works now! Thanks for your efforts everyone.
Update: it turns out this didn't work as well on my other machine, which led me to discover that someone must have changed access rights to the 32 bit registry on one of my machines. So it is still necessary to give the User access rights to the registry key you want to work with.
You need to run the process in elevated mode, or turn off UAC. You can of course assign access rights to your specific registry key that allows you access.
I have faced same issue. I have solved using following:
LPCTSTR subKey = TEXT("Software\\WOW6432Node\\Microsoft\\Windows\\CurrentVersion\\App Paths");
LONG openRes = RegOpenKeyEx(HKEY_LOCAL_MACHINE, subKey, 0, KEY_WOW64_32KEY && KEY_ALL_ACCESS, &hKey);

Delphi program & Windows 64-bit compatibility issue

I have some customers/candidate who complained that my program doesn't work on their Windows 7 64 bit version (confirmed with screenshots). The errors were strange, for example:
in the trial version i am
getting a error message whenever i
click on \"mark\" \"delete\" \"help\".
error msg is: Access violation at
address 0046C978 in module
\'ideduper.exe.\' read of address
00000004
windows 7 ultimate 64bit. i7 920
#2.67GHz 9gb or ram
'Mark', 'delete' and 'help' are just standard TToolButton on TToolbar.
The other example is failing to get a thumbnail from IExtractImage.
I have told them to try Compatibility mode but still doesn't work.
The problem is when I tested it on Windows 7 HP 64-bit on my computer (which I've done it before released it actually) it just works fine! So I don't know what causing it
Do you have any advice ?Are different Windows package (home basic,premium,ultimate,etc) treating 32 bit prog differently ?Are the newer version of Delphis (I use 2006) more compatible with 64 bit Windows ? Do I need to wait until 64 bit compiler out?
Thanks in advance
Your best bet in my opinion is to add MadExcept or EurekaLog or something similar to your application and give it to the customer to try again. MadExcept will generate log with stack trace, which will give you a clearer view of what is happening there.
To answer 2nd part of the question, 32bit Delphi programs work fine on 64bit Windows 7. I think it's more likely you have some memory management problems and the customer just happens to stumble upon them while you don't. Use FastMM4 to track those down.
Your applications is trying to access an invalid pointer. Changing environment may surface issues that are hidden in others. Check your application, and use FastMM + JCL+JCVL/MadExcept/EurekaLog to get a detailed trace of the issue. Some Windows APIs may have some stricter call requisites under 7 and/or 64 bit, but we would have to know what your app actually cals.
A free alternative to MadExcept is JCL Debug stuff. However it is less thorough and doesn't include the cool dialog box to send the stack trace to you via email, or as a file you can attach and manually email.
MadExcept is worth the money, and it is free for non-commercial use. You could try it first on your own PC, observe its functionality, and be sure it functions the way you want, and then buy it.
If buying Delphi is worth it (and it is!) then buying mad Except is a no brainer. But if you insist on rolling your own, JCLDebug (part of jedi code library) is also pretty nice.
Give them a stripped down version of your app and see when the problem goes away. I am betting it is your code as I never had any problems with my (hundreds of) W7/64 clients.
I'd be willing to bet it's an issue in your code. The reason it's failing on your customer's machine and not yours is that your machine probably has the default Data Execution Protection (DEP) enabled (which is turned on only for essential Windows programs and services), while your customer's computer is actually using DEP as intended (turned on for all programs and services).
The default setting (which is compatible with older versions of Windows, like 95/98/ME), allows software to execute code from what should be data segments. The more strict setting won't allow this, and raises a system-level exception instead.
You can check the settings between the two by looking at System Properties. I'm not at a Win7 machine right now, but on WinXP you get there by right-clicking on My Computer, choosing Properties, clicking on Performance Options, and then selecting the "Data Execution Prevention" tab. Find it on Vista/Win7 by using the Help; search for Data Execution Protection.
The solution, as previous answers have told you, is to install MadExcept or EurekaLog. You can also get a free version as part of JEDI, in JCLDebug IIRC. I haven't used it, so I can't vouch for it personally. I've heard it's pretty good, though.
If you don't want to go that route, set a breakpoint somewhere in the startup portion of your app (make sure to build with debugging info turned on). Run your app until the breakpoint is hit, and then use the IDE's Search->Goto Address (which is disabled until the breakpoint is hit). Enter the address from the exception dialog (not the one that's almost all zeros, but the 0046C978 address, prefixed with $ to indicate it's in hex) as in $0046C978. You'll probably end up in the CPU window looking at assembly code, but you can usually pick out a line of Delphi code of some sort that can sometimes give you a place to start looking.
In addition to all previous suggestions, I'll add the difference in accessing Registry under WOW64 compared to Win32. If your application is accessing Registry to read or write some settings, you should be aware of this. First, take a look at this and this page in the MSDN. On this page you will find 2 flags that determine the access you get to Registry from 32- or 64-bit application. KEY_WOW64_64KEY is the one that you should use.
In any case, I agree with others about using madExcept (or any other similar tool) to be able to find the exact cause of your problems.

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