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Why do we use Dll and where use it?



Nov 16 '05 #1
1 3036
A good explanation of what a dll is can be found here
http://support.microsoft.com/default...kb;en-us;87934

For example, you can use the winmm dll to play sounds.
Here are a couple of examples of there usage.
http://www.publicjoe.f9.co.uk/csharp/csharp17.html
http://www.publicjoe.f9.co.uk/csharp/csharp18.html

Important bits are

/* CODE */

using System.Runtime. InteropServices ;

[DllImport("winm m.dll")]
private static extern bool PlaySound( string lpszName, int hModule, int
dwFlags );

/* END OF CODE */

You then call the PlaySound method in the usual way.

Hope this helps

Publicjoe
C# Tutorial at http://www.publicjoe.f9.co.uk/csharp/tut.html
C# Snippets at http://www.publicjoe.f9.co.uk/csharp/snip/snippets.html
C# Ebook at http://www.publicjoe.f9.co.uk/csharp/samples/ebook.html

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Nov 16 '05 #2

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