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IHostMemoryManager::VirtualFree Method

Serves as a logical wrapper for the corresponding Win32 function. The Win32 implementation of VirtualFree releases, decommits, or releases and decommits a region of pages within the virtual address space of the calling process.

HRESULT VirtualFree (
    [in] LPVOID  lpAddress,
    [in] SIZE_T  dwSize,
    [in] DWORD   dwFreeType


[in] A pointer to the base address of the virtual memory pages to be freed.


[in] The size, in bytes, of the region to be freed.


[in] The type of freeing operation.




VirtualFree 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.


An attempt was made to free memory that was not allocated through the host.

VirtualFree frees virtual memory pages associated with the lpAddress parameter through an earlier call to the IHostMemoryManager::VirtualAlloc function. Attempts to free memory that was not allocated through the host should return HOST_E_INVALIDOPERATION.

The semantics are identical to those of the Win32 implementation of VirtualFree. For more information, see the Windows Platform documentation.

Platforms: See .NET Framework System Requirements.

Header: MSCorEE.idl

Library: Included as a resource in MSCorEE.dll

.NET Framework Versions: 3.5 SP1, 3.5, 3.0 SP1, 3.0, 2.0 SP1, 2.0