public ClipboardActions GetClipboardAction(ref Message m, ref string text, ref string format)
{
const int WM_PASTE = 0x0302;
// defined in winuser.h
const int WM_DRAWCLIPBOARD = 0x308;
const int WM_CHANGECBCHAIN = 0x030D;
switch (m.Msg)
{
case WM_DRAWCLIPBOARD:
DisplayClipboardData(ref text, ref format);
ClipboardNativeMethods.SendMessage(NextClipboardViewer, m.Msg, m.WParam, m.LParam);
return(ClipboardActions.DrawClipboard);
case WM_CHANGECBCHAIN:
if (m.WParam == NextClipboardViewer)
{
NextClipboardViewer = m.LParam;
}
else
{
ClipboardNativeMethods.SendMessage(NextClipboardViewer, m.Msg, m.WParam, m.LParam);
}
return(ClipboardActions.ChangeChain);
case WM_PASTE:
return(ClipboardActions.Paste);
default:
return(ClipboardActions.None);
}
}
public static string GetClipboardText()
{
IntPtr hInstance = IntPtr.Zero;
ClipboardNativeMethods.OpenClipboard(hInstance);
IntPtr buffer = ClipboardNativeMethods.GetClipboardData(13);
string text = Marshal.PtrToStringUni(buffer);
ClipboardNativeMethods.CloseClipboard();
return(text);
}
public static bool SetClipboardText(string text)
{
if (!ClipboardNativeMethods.OpenClipboard(IntPtr.Zero))
{
return(false);
}
ClipboardNativeMethods.EmptyClipboard();
IntPtr alloc = MemoryNativeMethods.GlobalAlloc(MemoryNativeMethods.GMEM_MOVEABLE | MemoryNativeMethods.GMEM_DDESHARE, (UIntPtr)(sizeof(char) * (text.Length + 1)));
IntPtr gLock = MemoryNativeMethods.GlobalLock(alloc);
if ((int)text.Length > 0)
{
Marshal.Copy(text.ToCharArray(), 0, gLock, text.Length);
}
MemoryNativeMethods.GlobalUnlock(alloc);
ClipboardNativeMethods.SetClipboardData(13, alloc);
ClipboardNativeMethods.CloseClipboard();
return(true);
}