GetLastError and managed code ★★★★★★★★★★★★★★★ Adam Nathan [MSFT]April 25, 20033 0 0 0 In the Win32 world, calling the GetLastError API is often the mechanism to get additional error information when If so, that defeats the purpose of C# having GetLastWin32Error. Make all the statements true Can Communism become a stable economic strategy? Create a function alike: CallComErrMsgBox(HRESULT hr) and put all your _com_error calls in that(using the 'hr' above).
The ones we pass to CoCreateInstance() here are the so-called CLSIDs and IIDs. I have used _com_error a lot in the past for dealing with HRESULTS. Trying to Send Automated Faxes from ASP Web Page Causes Operation Failed Error (.NET) Problem You are working with XP Pro on a development machine, and have installed the fax service Siva Ranganeni24-May-06 4:17 Siva Ranganeni24-May-06 4:172 Hi, This is a great article and very helpful.
I hate to think of what calling it would be like under C#. ---------- Will Pittenger E-Mail: mailto:email@example.com All mail filtered by Qurb (www.qurb.com) Nov 15 '05 #1 Post Reply Share Discussion It's worth discussing this particular approach to error-handling, and in particular cases in which it's not a good idea. How to limit a xorg installation to a single video driver? You can throw, catch etc.
Using FAXCOMEXLib to Build Automated Fax Application on XP Causes Operation Failed Error (.NET) Problem You are attempting to build an automated client to send faxes on XP Professional. Member Login Remember Me Forgot your password? To follow along with me and see this for yourself in the sample application, click the Call COM Function And Get Error button. C# Getlasterror Example If you want to access this error code, you must call GetLastWin32Error instead of writing your own platform invoke definition for GetLastError and calling it.
So the FAILED(...) macro only tests for bit 31 of the HRESULT set. Marshal.getlastwin32error Error Codes I used COM/DCOM to write an ad hoc cluster server and job-running environment for a cluster of 24 Windows-based high-end visualization workstations. Look up FAILED in the docs if you want more information. anchor error C2664: 'MessageBoxA' : cannot convert parameter 2 from 'const char *(void) const' to 'const char *' There is no context in which this conversion is possible How to fix this?
Exploded Suffixes Chebyshev Rotation Why did Moody eat from the school sausages? C# Getlastwin32error Resist the temptation to do everything in one line. The solution is to install the shared 2003 fax on this machine (installation is the same as installing a network printer). Reply C# Frequently Asked Questions says: March 15, 2004 at 12:51 pm Reply Euphemos » Blog Archive » HRESULTs and Win32 Error Codes Introduction says: March 19, 2008 at 3:35 pm
However both Win32 and COM produce extremely "techie", unhelpful error messages and I nearly always find that they require massaging if they are going to be of any help to a https://www.nerdyhearn.com/blog/140 Note: This is not the way, ordinarily, to go about accessing COM interfaces! Marshal Getlastwin32error C# Readers are also encouraged to address their posts not to me, but instead to the general readership of this article. Getlastwin32error Codes As others have said, there is no way to get those capitalized, underscored names, short of looking them up in winerror.h, which I have seen reproduced online in various places where
Then later on I worked with COM/DCOM for a school internship. That's because the CLR itself could be making calls to the operating system as the call returns from unmanaged to managed code (when it unmarshals parameters, for instance) and these calls Again excellent article. Similar topics win32 error Where is the part to set when my mouse pointer move to textbox or label or buton it will display text description ? C# Win32 Error Codes
Create a wire coil Karger's Algorithm question Show that a nonabelian group must have at least five distinct elements How exactly does the typical shell "fork bomb" calls itself twice? more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed at FAXCOMEXLib.FaxDocumentClass.ConnectedSubmit(FaxServer pFaxServer) at ASP.faxbooking_aspx.__Renderform1(HtmlTextWriter __w, Control parameterContainer) in C:\inetpub\wwwroot\FaxBooking\FaxBooking.aspx:line 35 The issue seems to be related to either the DLL or IIS, or a permissions problem. Another upside of using _com_error natively is that the system error messages are automatically localized so that they appear in the language that the computer's locale is using.
About Us PC Review is a computing review website with helpful tech support forums staffed by PC experts. C# System Error Codes If you like, you can just copy the GUIDs from Listng 5 above to your project if you're following along. By definition every negative HRESULT is an error.
On the command line, type: net helpmsg 4312 Expected output: The object identifier does not represent a valid object This error is related to the printer installation on the machine running View the 2 replies to this messageSign In·Permalink Two words for you Rob Manderson1-Jan-06 9:33 Rob Manderson1-Jan-06 9:332 Bloody brilliant! DocuTerminal - Online Filing Cabinet solution. Win32exception The error code is Interop.FaxComExLib with the number: 710D8.
Thank you! To get the actual error message, turn the code of the error (the last part, 0x10D8) into a decimal – 4312. Jadhav tried to work around this by providing a CWin32Error class, which was even throwable as an exception object, which supposedly does what, in fact, the compiler's COM support already gives A few words about passing GetLastError() as an argument...
Mostly the functions themselves only return a hard-to-parse HRESULT (from COM) or an invalid HANDLE value (such as INVALID_HANDLE_VALUE or some other such value). This documentation is archived and is not being maintained. Once the exception object is constructed, you could check its Message property and see the result of the FormatMessage call. An Operation Failed error is thrown at this line: JobID = objFaxDocument.ConnectedSubmit(objFaxServer) The exact error is as follows: exc.Message: 'Operation Failed' exc.Source: 'FaxComEx.FaxDocument.1'Solution Uninstall the fax service and install it again
In the Win32 world, you'd probably call the FormatMessage API next to get a meaningful message describing what error 123 means. This article is one of them. Thankfully, there's a shortcut way to get this message, exposed through the Win32Exception class. Of course you also need to remember to set the SetLastError named parameter on your DllImport attribute to true,and obtain the error code through a call to Marshal.GetLastWin32Error, since P/Invoking to
More Great COM Articles (click here) Anyway - all the introductions aside - here's how to handle the failure of a COM function. How that failure is indicated depends on the API. How that failure is indicated depends on the API.Tags Managed Code Comments (3) Cancel reply Name * Email * Website David Pickett says: April 26, 2003 at 2:48 pm Stay logged in Welcome to PC Review!
To do this, the fax functionality is built using a dedicated Web form. Finally, don't forget about the rules of GetLastError, which are not specific to managed code but still apply: 1) Not all Win32 APIs make use of this mechanism. Pass GetLastError as a parameter to CallComErrMsgBox(). FYI, I have tried with VC6 and it works fine.
This member cannot be used by partially trusted or transparent code.Version InformationUniversal Windows PlatformAvailable since 8.NET FrameworkAvailable since 1.1Portable Class LibrarySupported in: portable .NET platformsSilverlightAvailable since 2.0Windows Phone SilverlightAvailable since 7.0Windows ARB703-Jan-06 11:43 ARB703-Jan-06 11:434 The fact that both Win32 and COM error messages are frequently cryptic and unhelpful. It turns out there's an even simpler approach, and one that will look up the error value, and parse it, and display the corresponding string (if found) in a message box,