Marshal.AllocCoTaskMem(Int32) Method

Definition

Allocates a block of memory of specified size from the COM task memory allocator.

public:
 static IntPtr AllocCoTaskMem(int cb);
[System.Security.SecurityCritical]
public static IntPtr AllocCoTaskMem (int cb);
static member AllocCoTaskMem : int -> nativeint
Public Shared Function AllocCoTaskMem (cb As Integer) As IntPtr

Parameters

cb
Int32

The size of the block of memory to be allocated.

Returns

An integer representing the address of the block of memory allocated. This memory must be released with FreeCoTaskMem(IntPtr).

Attributes

Exceptions

There is insufficient memory to satisfy the request.

Remarks

AllocCoTaskMem is one of two memory allocation API methods in the Marshal class. (Marshal.AllocHGlobal is the other.) The initial memory content returned is undefined, and the allocated memory can be larger than the requested number of bytes. This method exposes the COM CoTaskMemAlloc function, which is referred to as the COM task memory allocator.

Security

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

Applies to

See also