The IsBadCodePtr function determines whether the calling process has read access to the memory at the specified address.
BOOL IsBadCodePtr(
| FARPROC lpfn | // address of function |
| ); |
Parameters
lpfn
Points to an address in memory.
Return Values
If the calling process has read access to the specified memory, the return value is zero.
If the calling process does not have read access to the specified memory, the return value is nonzero. To get extended error information, call GetLastError.
Remarks
IsBadCodePtr checks the read access only at the specified address and does not guarantee read access to a range of memory.
In a preemptive multitasking environment, it is possible for some other thread to change the process's access to the memory being tested. Even when the function indicates that the process has read access to the specified memory, you should use structured exception handling when attempting to access the memory. Use of structured exception handling enables the system to notify the process if an access violation exception occurs, giving the process an opportunity to handle the exception.
See Also
IsBadHugeReadPtr, IsBadHugeWritePtr, IsBadReadPtr, IsBadStringPtr, IsBadWritePtr