21.6. Error Handling
TheGetLastError andBeep functions have been used throughout this book. There are several other error-handling functions, however, and you will find them useful for special situations or when trying to polish an application or DLL.
| GetLastError | Returns the error code of the most recent error |
DWORD GetLastError(VOID) | |
| Returns the error code of the last error | |
| Beep | Beeps the systems speaker at the specified frequency for the specified time |
BOOL Beep( DWORD freq, DWORD duration) | |
| freq | Frequency of the sound |
| duration | Time in milliseconds for beep |
| Returns TRUE on success | |
For example, in certain cases you want a window that does not currently have focus to be able to get the user's attention. If it beeps it confuses the user because ...
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