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POExtending Aero Glass in F# (PInvoke)
 

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    <p>I'm working on a F# console application. In the properties I set the output type of application to <em>Windows Application</em> to hide the console. I also created a form to run in its place. Currently I only have a simple form with no controls. To make the form I added referances to <code>System.Windows.Forms</code> and <code>System.Drawing</code> and opened them along with <code>System.Runtime.InteropServices</code>.</p> <p>The part that I don't know how to do is extending the aero-glass. There are loads of exaples on how to do it in C#. For example, here is the API call and MARGINS structure:</p> <pre><code>[StructLayout(LayoutKind.Sequential)] public struct MARGINS { public int cxLeftWidth; public int cxRightWidth; public int cyTopHeight; public int cyBottomHeight; } [DllImport("dwmapi.dll")] pubic static extend int DwmExtendFrameIntoClientArea(IntPtr hWnd, ref MARGINS pMarInset); </code></pre> <p>The API call from Form_Load event:</p> <pre><code>MARGINS margins = new MARGINS(); margins.cxLeftWidth = 0; margins.cxRightWidth = 100; margins.cyTopHeight = 0; margins.cyBottomHeight = 0; int result = DwmExtendFrameIntoClientArea(this.Handle, ref margins); </code></pre> <p>This is what I've got so far in F#:</p> <p>The API call and MARGINS structure:</p> <pre><code>[&lt;StructLayout(LayoutKind.Sequential)&gt;] type MARGINS = struct val cxLeftWidth : int val cxRightWidth : int val cyTopHeight : int val cyBottomHeigh t: int new(left, right, top, bottom) = { cxLeftWidth = left; cxRightWidth = right; cyTopHeight = top; cyBottomHeigh = bottom } (*Is there any other way to do this?*) end [&lt;DllImport("dwmapi.dll")&gt;] extend int DwmExtendFrameIntoClientArea(IntPtr hWnd, (*I need help here*)) </code></pre> <p>The API call from Form_Load event:</p> <pre><code>let margins = new MARGINS(0, 100, 0, 0); (*Is there any other way to do this?*) let result : int = DwmExtendFrameIntoClientArea(this.Handle, (*I need help here*)) </code></pre> <p>I have been searching around but I can't find anything about using <code>ref</code> parameters like this in F#. I know this would be a lot easier to write in C# but the code behind the form will be easier to write int F# because it's a functional programing language and the whole program I'm writing is orientated around functions. I know this is purely decorative but please help.</p>
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