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    <p>With the <a href="http://msdn.microsoft.com/en-us/library/9xc4z2c7.aspx" rel="nofollow"><code>CImageList</code> class</a> instance (which you get by calling to the <a href="http://msdn.microsoft.com/en-us/library/b75edw6k.aspx" rel="nofollow"><code>Detach</code> method</a> on the <a href="http://msdn.microsoft.com/en-US/library/hc0d17x3.aspx" rel="nofollow"><code>GetImageList</code> method</a> on the <a href="http://msdn.microsoft.com/en-us/library/hfshke78.aspx" rel="nofollow"><code>CListCtrl</code></a> instance that you have), you can get the <code>HIMAGELIST</code> handle by calling the <a href="http://msdn.microsoft.com/en-us/library/b75edw6k.aspx" rel="nofollow">Detach method</a>.</p> <p>From there you can call the underlying Windows API through the <a href="http://msdn.microsoft.com/en-us/library/aa446536.aspx" rel="nofollow">Platform Invocation Services (P/Invoke) layer</a>.</p> <p>The following assumes you have this <code>HIMAGELIST</code> pointer in an <a href="http://msdn.microsoft.com/en-us/library/system.intptr.aspx" rel="nofollow"><code>IntPtr</code></a>:</p> <pre><code>IntPtr imageList = ...; </code></pre> <p>First, you'll need to declare the <a href="http://msdn.microsoft.com/en-us/library/windows/desktop/bb761552.aspx" rel="nofollow"><code>ImageList_GetImageCount</code> function</a> in .NET:</p> <pre><code>[DllImport("Comctl32.dll", SetLastError = true)] static extern int ImageList_GetImageCount(IntPtr himl); </code></pre> <p>And of course, store the result of that call in a variable:</p> <pre><code>int imageCount = ImageList_GetImageCount(imageList); </code></pre> <p>You'll also need to be able to get the details about each image, so you'll need the call to <a href="http://msdn.microsoft.com/en-us/library/windows/desktop/bb761554.aspx" rel="nofollow"><code>ImageList_GetImageInfo</code></a>:</p> <pre><code>[StructLayout(LayoutKind.Sequential)] struct RECT { public int left, top, right, bottom; } [StructLayout(LayoutKind.Sequential)] struct IMAGEINFO { public IntPtr hbmImage; public IntPtr hbmMask; public int Unused1; public int Unused2; public RECT rcImage; } [DllImport("Comctl32.dll", SetLastError = true)] static extern bool ImageList_GetImageInfo(IntPtr himl, int i, ref IMAGEINFO pImageInfo); </code></pre> <p>With these, you can start your loop to get the information about the image:</p> <pre><code>for (int i = 0; i &lt; imageCount; ++i) { // The image info. var imageInfo = new IMAGEINFO(); // Get the call to ImageList_GetImageInfo. if (!ImageList_GetImageInfo(imageList, i, ref imageInfo) throw new System.ComponentModel.Win32Exception(); </code></pre> <p>Notice that in the <a href="http://msdn.microsoft.com/en-us/library/windows/desktop/bb761393.aspx" rel="nofollow"><code>IMAGEINFO</code> structure</a> has a field that contains the pointer to the bitmap (the <code>hbmImage</code> field).</p> <p>This is a handle to an <a href="http://msdn.microsoft.com/en-us/library/windows/desktop/aa383751%28v=vs.85%29.aspx" rel="nofollow"><code>HBITMAP</code></a> handle, which has an equivalent in .NET in the <a href="http://msdn.microsoft.com/en-us/library/system.drawing.bitmap.aspx" rel="nofollow"><code>Bitmap</code> class</a>. You can translate between the two by calling the static <a href="http://msdn.microsoft.com/en-us/library/k061we7x.aspx" rel="nofollow"><code>FromHbitmap</code> method</a> on the <a href="http://msdn.microsoft.com/en-us/library/84767bxk.aspx" rel="nofollow"><code>Image</code> class</a> (yes, it's strange it's not on the <code>Bitmap</code> class):</p> <pre><code> using (Bitmap bitmap = Image.FromHbitmap(imageInfo.hbmImage)) { </code></pre> <p>Once you have the <code>Bitmap</code> instance, you can call the <a href="http://msdn.microsoft.com/en-us/library/system.drawing.bitmap.save.aspx" rel="nofollow"><code>Save</code> method</a> on each instance to dump them to disk:</p> <pre><code> bitmap.Save("&lt;need to generate a filename&gt;.&lt;and extension&gt;"); } } </code></pre> <p>Note that there is the <a href="http://msdn.microsoft.com/en-us/library/system.windows.forms.imagelist.aspx" rel="nofollow"><code>ImageList</code> class</a> in .NET, but there's no way to pass the <code>HIMAGELIST</code> handle to the managed implementation (which would have made this much easier).</p>
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