getlasterror codes

When compiling applications in VC, it is often necessary to handle errors. Many function calls only use True or false to indicate the function running result. Once an error occurs, msdn often points out that you should use the getlasterror ()

VC GetLastError () get the use of error informationWhen you write an application in VC, you often need to deal with error handling issues. Many function calls use only true and false to indicate the result of a function's operation. In the event of

Many Windows API functions do not return values to express error messages. Instead, they allow callers to Use API getlasterror () to obtain error codes.   When debugging the program, we can see that the API function call failed. We want to see the

When using C ++ to develop a Windows program, we often see the following judgment: Copy codeThe Code is as follows: HRESULT hr =: RegCreateKeyEx (hk, szKeyPath, 0, NULL, REG_OPTION_NON_VOLATILE, KEY_QUERY_VALUE, NULL, & hk, NULL ); If (SUCCEEDED (hr

When you use C + + to develop a Windows program, you often see the following judgments: Copy Code code as follows: HRESULT hr =:: RegCreateKeyEx (HK, szkeypath, 0, NULL, reg_option_non_volatile, key_query_value, NULL, &HK, NULL); if

Associating processes and ports is a very useful function. You can clearly know which programs are using which ports are helpful for trojan detection and removal. However, although we can use the task manager to browse the process list and use

Author: Zhu Jinchan Source: http://blog.csdn.net/clever101 A software system must be involved in a lot of error messages. For example, if a user performs an error, the software needs to return the error message to the user. So how do you design

The beauty of returning a pointer to an object, is that you can return NULL as your standard error return value, and if the value mattered, you will most likely take the necessary steps to check its return value, or they application will just crash

Introduction The dynamic loading of device drivers is mainly completed by Service Control Manager (SCM) system components. SCM components can provide many services, such, start, stop, and control services. Write and load the driver, which is mainly

Have you ever had to exchange data between two. NET applications on the same machine? For example, a Web site and a Windows service ?. NET Framework provides several good options to complete inter-process communication (IPC): Web Service, Remoting.