> For the complete documentation index, see [llms.txt](https://www.pinvoke.dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.pinvoke.dev/ntdll/ntfreevirtualmemory.md).

# NtFreeVirtualMemory

```csharp
[DllImport("ntdll.dll", ExactSpelling = true)]
[DefaultDllImportSearchPaths(DllImportSearchPath.System32)]
public static extern unsafe NTSTATUS NtFreeVirtualMemory(
    HANDLE ProcessHandle,
    void* BaseAddress,
    uint* RegionSize,
    uint FreeType);
```

[VIRTUAL\_FREE\_TYPE](/memory/virtual_free_type.md)