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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 class ShellFunctions
	{
		public static IMalloc GetMalloc()
		{
			IntPtr ptrRet;
			ShellApi.SHGetMalloc(out ptrRet);
				
			Object obj = Marshal.GetTypedObjectForIUnknown(ptrRet,GetMallocType());
			IMalloc imalloc = (IMalloc)obj;
				
			return imalloc;
		}

		public static IShellFolder GetDesktopFolder()
		{
			IntPtr ptrRet;
			ShellApi.SHGetDesktopFolder(out ptrRet);

			System.Type shellFolderType = System.Type.GetType("ShellLib.IShellFolder");
			Object obj = Marshal.GetTypedObjectForIUnknown(ptrRet,shellFolderType);
			IShellFolder ishellFolder = (IShellFolder)obj;

			return ishellFolder;
		}

		public static Type GetShellFolderType()
		{
			System.Type shellFolderType = System.Type.GetType("ShellLib.IShellFolder");
			return shellFolderType;
		}

		public static Type GetMallocType()
		{
			System.Type mallocType = System.Type.GetType("ShellLib.IMalloc");
			return mallocType;
		}

		public static Type GetFolderFilterType()
		{
			System.Type folderFilterType = System.Type.GetType("ShellLib.IFolderFilter");
			return folderFilterType;
		}

		public static Type GetFolderFilterSiteType()
		{
			System.Type folderFilterSiteType = System.Type.GetType("ShellLib.IFolderFilterSite");
			return folderFilterSiteType;
		}

		public static IShellFolder GetShellFolder(IntPtr ptrShellFolder)
		{
			System.Type shellFolderType = GetShellFolderType();
			Object obj = Marshal.GetTypedObjectForIUnknown(ptrShellFolder,shellFolderType);
			IShellFolder RetVal = (IShellFolder)obj;
			return RetVal;
		}
			
	}

}

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License

This article, along with any associated source code and files, is licensed under The Microsoft Public License (Ms-PL)

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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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