Note
Access to this page requires authorization. You can try signing in or changing directories.
Access to this page requires authorization. You can try changing directories.
Other versions of this page are also available for the following:
.gif "A hyphen indicates that the information in this topic is not relevant for this platform, or that the platform does not support the API that is listed.")
.gif "A checkmark indicates that the information in this topic is relevant for this platform, and that any API listed is also supported on this platform.")
8/28/2008
This function checks whether a region of memory is valid with respect to the caller process.
Note This function is no longer supported as of CE 6.0.
LPVOID MapCallerPtr(
LPVOID ptr,
DWORD dwLen
);
- ptr
[in] Pointer to the region of memory.
- dwLen
[in] Length, in bytes, of the region of memory.
The mapped version of ptr indicates that the region is valid. NULL indicates failure.
MapCallerPtr is generally used in device driver I/O controls to validate the pointer parameters passed by the caller process. Because device drivers usually run with higher privileges and have access to more memory, if you do not call this function to validate the parameters, it could overwrite a process's memory. It could also overwrite the kernel memory if called from a malicious application.
| Header | pkfuncs.h |
| Library | coredll.lib |
| Windows Embedded CE | Windows CE .NET 4.0 and later |