Serves as a logical wrapper for the corresponding Win32 function. The Win32 implementation of
VirtualProtect changes the protection on a region of committed pages in the virtual address space of the calling process.
HRESULT VirtualProtect ( [in] void* lpAddress, [in] SIZE_T dwSize, [in] DWORD flNewProtect, [out] DWORD* pflOldProtect );
[in] A pointer to the base address of the virtual memory whose protection attributes are to be changed.
[in] The size, in bytes, of the region of memory pages to be changed.
[in] The type of memory protection to apply.
[out] A pointer to the previous memory protection value.
|HOST_E_CLRNOTAVAILABLE||The common language runtime (CLR) has not been loaded into a process, or the CLR is in a state in which it cannot run managed code or process the call successfully.|
|HOST_E_TIMEOUT||The call timed out.|
|HOST_E_NOT_OWNER||The caller does not own the lock.|
|HOST_E_ABANDONED||An event was canceled while a blocked thread or fiber was waiting on it.|
|E_FAIL||An unknown catastrophic failure occurred. When a method returns E_FAIL, the CLR is no longer usable within the process. Subsequent calls to hosting methods return HOST_E_CLRNOTAVAILABLE.|
This implementation of
VirtualProtect returns an HRESULT value, while the Win32 implementation returns a non-zero value to indicate success, and a zero value to indicate failure. For more information, see the Windows Platform documentation.
Platforms: See System Requirements.
Library: Included as a resource in MSCorEE.dll
.NET Framework Versions: Available since 2.0