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Posted 13 Mar 2003

C# does Shell, Part 4

, 26 Mar 2003
This article is about the AutoComplete features enabled by windows and how to use them with C#. AutoComplete is the ability to expand strings written in an edit box. The article will develop a class for using this functionality in you applications.
using System;
using System.Runtime.InteropServices;

namespace ShellLib

	public interface IMalloc 
		// Allocates a block of memory.
		// Return value: a pointer to the allocated memory block.
		IntPtr Alloc(
			UInt32 cb);		// Size, in bytes, of the memory block to be allocated. 
		// Changes the size of a previously allocated memory block.
		// Return value:  Reallocated memory block 
		IntPtr	Realloc(
			IntPtr pv,		// Pointer to the memory block to be reallocated.
			UInt32 cb);		// Size of the memory block (in bytes) to be reallocated.

		// Frees a previously allocated block of memory.
		void Free(
			IntPtr pv);		// Pointer to the memory block to be freed.

		// This method returns the size (in bytes) of a memory block previously allocated with 
		// IMalloc::Alloc or IMalloc::Realloc.
		// Return value: The size of the allocated memory block in bytes 
		UInt32 GetSize(
			IntPtr pv);		// Pointer to the memory block for which the size is requested.

		// This method determines whether this allocator was used to allocate the specified block of memory.
		// Return value: 1 - allocated 0 - not allocated by this IMalloc instance. 
		Int16 DidAlloc(
			IntPtr pv);		// Pointer to the memory block

		// This method minimizes the heap as much as possible by releasing unused memory to the operating system, 
		// coalescing adjacent free blocks and committing free pages.
		void HeapMinimize();

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About the Author

Arik Poznanski
Software Developer (Senior) Verint
Israel Israel
Arik Poznanski is a senior software developer at Verint. He completed two B.Sc. degrees in Mathematics & Computer Science, summa cum laude, from the Technion in Israel.

Arik has extensive knowledge and experience in many Microsoft technologies, including .NET with C#, WPF, Silverlight, WinForms, Interop, COM/ATL programming, C++ Win32 programming and reverse engineering (assembly, IL).

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