You may have a situation where you need to sign a file which may be an a. .exe b. .cab c. .cat d. .ocx e. .dll f. .stl Using the CryptoAPI “signtool.exe”, the files can be digitally signed. Digitally signing a file essentially involves two steps. 1. Obtaining...

Here is the scenario - You have a legacy application where you wish to load a DLL or module at a fixed or preferred base address.  Why would you need it?,  that is because in the EXE or DLL code you may make use of the absolute addresses and...

Introduction:     ARP is used to perform Duplicate Address Detection by sending an ARP request in which the Target Protocol Address is set to the IP address for which duplication is being detected. In other words, to detect whether other...

If you enabled the “fipsalgorithmpolicy” sub key in registry location “HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa” to “1”, the applications that used the RijndaelManaged class give an exception saying: “Error: This implementation is not...

  Question: Is there any API available to check SLP 1.0 values from the BIOS? Answer: Yes, you can use EnumSystemFirmwareTables API for that. EnumSystemFirmwareTables API enumerates all system firmware tables of the specified type. It supports 3...

If you are creating the cryptographic keys on the user's profile directory you may get a cryptographic exception saying: "CryptographicException: The system cannot find the file specified". The stack trace looks like: System.Security.Cryptography...

Your custom created 32 bit performance counters do not show counter information when generating logs using user defined Data collector Set with 32 bit “PerfMon” tool on 64 bit windows Server 2008 machine. However, you are able to get live performance...

If you are in a situation where, one process creates a MUTEX with default security descriptor and other process running in the same user’s context is not able to access it. You might be facing the problem because of newly introduced integrity mechanism...

Recently, I was troubleshooting a problem for one of my customers. A named pipe created by a native C application was not accessible by web client. The actual product is a convention Windows application which does IPC through named pipes. Both server...

Working with Windows Service and Web Service together is nothing less than fun, especially when you are not an ASP.NET expert. Like many native developers I have my own challenges with words like managed, web service and web applications! I was debugging...

In the recent past, I have seen few question coming to me saying, “How do I write data on the CD/DVD disk programmatically?” . During my research, I came across the interfaces available on Windows for burning CD/DVD programmatically that I want to share...

Generally Multicast Sockets should be bound to the wildcard address [INADDR_ANY], before joining the group. Once the binding is done, you can join to the desired group by calling SetSockOpt API with IP_ADD_MEMBERSHIP providing the IP address of the...

   IP Datagrams gets routed dynamically in the sense, we cannot precisely predict which path every IP Datagram will take to reach the destination. Some times you may need to fix the path[ a set of routers] through which the IP Datagram must...

Question: We are trying to use some of the new WLAN APIs to get wireless network and password settings so that they can automatically connect to the network that the user is already connected to. We are getting XML based profile with keyMaterial using...

Question: Why does my DirectShow based video capture application fail to set resolution for the LifeCam VX-6000/VX-3000 webcam when LifeCam software is installed in the system? Is there any way to resolve this issue programmatically? Here is the code...

You can verify this with a simple program, stated below that shows that CryptoStream.Close() is explicitly not required. The expected result should be 104 since 13 bytes should be allocated. We get 104 with a call to Close() or without calling Close(...

Symptom: You may get Security Warning dialog while launching a process using fully qualified domain name path of the image. The warning dialog does not occur if image path is UNC path. For example, following piece of code will get the security warning...

Question: Why does the NdrClientCall2() API call takes more then 4-5 milliseconds to complete in my application? In rare cases I even see hundreds of milliseconds (57 millisecond at one time) just for the NdrClientCall2() API call to complete. In my application...

String Table in the  Resource File [RC File] generated by CTRPP tool has junk characters for Unicode strings defined in the performance counter manifest XML file. Symptom: ======== You have defined the Performance Counter in an XML file which contains...

Symptom: =======   WriteFile API returns TRUE and succeeds, but data is not written to the SAN Drive. In such a scenario, the lpNumberOfBytesWritten parameter returns Zero, but WriteFile indicates that it has succeeded in writing the data. Questions...

It is always possible to write our own storage system for Windows media files and make the content available to users via streaming. A possibility of doing this is to write our own source plug-in as a DLL, which should implements the Istream interface...

Symptom: ======= GetIPForwardTable return’s undocumented error ERROR_MORE_DATA where it should actually return ERROR_INSUFFICIENT_BUFFER in a Windows XP environment. Questions: ========= Is this an expected behavior? How we should handle the situation...

Question: On Windows XP, I am starting regedit.exe in suspended mode and forcing it to call the LoadLibrary () API to load an external DLL by using the CreateRemoteThread () API.  After loading the DLL, when I try to resume the suspended thread,...

Symptom: ======== You have several threads in your application running , but you observe that only One CPU Core is being utilized by all of your threads and you don't see any activity on the other CPU Cores. Questions: ======== Why do I don't see any...

There might be a need that an application need to send multiple files to the FAX server in one single call. While IFaxDocument::ConnectedSubmit Method allows to send a single file to FAX in one call, IFaxDocument2::ConnectedSubmit2 Method can be used...