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Marshal.ReAllocCoTaskMem Method

Resizes a block of memory previously allocated with AllocCoTaskMem.

Namespace:  System.Runtime.InteropServices
Assemblies:   System.Runtime.InteropServices (in System.Runtime.InteropServices.dll)
  mscorlib (in mscorlib.dll)

public static IntPtr ReAllocCoTaskMem(
	IntPtr pv,
	int cb
)

Parameters

pv
Type: System.IntPtr

A pointer to memory allocated with AllocCoTaskMem.

cb
Type: System.Int32

The new size of the allocated block.

Return Value

Type: System.IntPtr
An integer representing the address of the reallocated block of memory. This memory must be released with FreeCoTaskMem.

ExceptionCondition
OutOfMemoryException

There is insufficient memory to satisfy the request.

ReAllocCoTaskMem is one of two memory reallocation methods in the Marshal class. (ReAllocHGlobal is the other.) The beginning of the reallocated memory content is the same as the original content; however, the entire memory block can be in a different location. This method exposes the COM CoTaskMemRealloc function, which is referred to as the COM task memory allocator.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

Supported in: Windows Phone 8.1

  • SecurityCriticalAttribute 

    requires full trust for the immediate caller. This member cannot be used by partially trusted or transparent code.

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