[Mono-list] Enable/disable Paste menu item

[Andrus]

I need to automatically enable/disable Paste menu item in MONO .NET 2 
Winform Edit menu.

http://www.yoda.arachsys.com/csharp/faq/#clipboard  explains how to 
implement this using p/invoke.

How to implement this functionality in MONO WinForms in Linux ?

Andrus.


http://www.yoda.arachsys.com/csharp/faq/#clipboard contains:


How can I monitor changes to the Clipboard contents (e.g. to enable/disable 
items on the Edit menu, depending on whether there is something to paste)?

Import the SetClipboardViewer API function, and call it in your 
initialisation code, passing the handle of your form. The form will then 
receive WM_DRAWCLIPBOARD messages, which you can handle in WndProc.

using System.Runtime.InteropServices;
...
[DllImport("user32.dll")]
public static extern int SetClipboardViewer(int hWnd);
private const int WM_DRAWCLIPBOARD = 776;

// ... somewhere in initialisation code ...
SetClipboardViewer(this.Handle.ToInt32());

protected override void WndProc(ref Message m)
{
  // Process the message normally
  base.WndProc(ref m);

  if (m.Msg == WM_DRAWCLIPBOARD)
  {
     // ... respond to Clipboard changes ...
  }
}