getlasterror error 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

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

FrontierLearning Windows core programming is the only way to step into the Windows Programming Hall, 2018 winter vacation relive the knowledge of computer operating system, the former has been learning Windows program design, the basis of the

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

Custom error pageAlthough the public error message we send to the user is secure, that is, it does not threaten the secret of the application, but such information is not good-looking. Maybe you want users to never see such information. On the