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.
[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.
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.
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 .NET Framework System Requirements.
Library: Included as a resource in MSCorEE.dll
.NET Framework Versions: 4.6, 4.5.2, 4.5.1, 4.5, 4, 3.5 SP1, 3.5, 3.0 SP1, 3.0, 2.0 SP1, 2.0