.AllocHGlobal Method (Int32)
Allocates memory from the unmanaged memory of the process by using the specified number of bytes.
public static IntPtr AllocHGlobal(
Parameters cb Type: System .Int32
The required number of bytes in memory.
is one of two memory allocation methods in the AllocHGlobal class. ( Marshal is the other.) This method exposes the Win32 Marshal .AllocCoTaskMem LocalAlloc function from Kernel32.dll.
calls AllocHGlobal , it passes a LocalAlloc flag, which causes the allocated memory to be locked in place. Also, the allocated memory is not zero-filled. LMEM_FIXED
The following example demonstrates calling the
method. This code example is part of a larger example provided for the AllocHGlobal class. Marshal
// Demonstrate how to call GlobalAlloc and
// GlobalFree using the Marshal class.
IntPtr hglobal = Marshal.AllocHGlobal(100);
Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0
.NET Framework Client Profile
Supported in: 4, 3.5 SP1
Portable Class Library
Supported in: Portable Class Library
.NET for Windows Store apps
Supported in: Windows 8
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.