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 );
VirtualProtect returned successfully.
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.
The call timed out.
The caller does not own the lock.
An event was canceled while a blocked thread or fiber was waiting on it.
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.