public static byte[] GetClipboardData(string format)
{
uint formatHandle = User32.RegisterClipboardFormat(format);
if (formatHandle != 0)
{
User32.OpenClipboard(IntPtr.Zero);
//Get pointer to clipboard data in the selected format
var clipboardDataPointer = User32.GetClipboardData(formatHandle);
//Do a bunch of crap necessary to copy the data from the memory
//the above pointer points at to a place we can access it.
var length = Kernel32.GlobalSize(clipboardDataPointer);
var gLock = Kernel32.GlobalLock(clipboardDataPointer);
//Init a buffer which will contain the clipboard data
var buffer = new byte[(int)length];
//Copy clipboard data to buffer
Marshal.Copy(gLock, buffer, 0, (int)length);
User32.CloseClipboard();
return(buffer);
}
return(new byte[0]);
}
public static void SetText(ReadOnlySpan <char> value)
{
var memoryLength = (value.Length + 1) * sizeof(char);
// SetClipboardData requires GMEM_MOVEABLE.
// https://docs.microsoft.com/en-us/windows/desktop/api/Winuser/nf-winuser-setclipboarddata#parameters
using (var memory = Kernel32.GlobalAlloc(Kernel32.GMEM.MOVEABLE, (UIntPtr)memoryLength))
{
unsafe
{
var pointer = Kernel32.GlobalLock(memory);
if (pointer is null)
{
throw new Win32Exception();
}
try
{
fixed(char *valuePointer = value)
Buffer.MemoryCopy(valuePointer, pointer, memoryLength, memoryLength);
*((char *)pointer + value.Length) = '\0';
}
finally
{
if (!Kernel32.GlobalUnlock(memory))
{
var error = Marshal.GetLastWin32Error();
if (error != 0)
{
throw new Win32Exception(error);
}
}
}
}
if (!User32.OpenClipboard(hWndNewOwner: IntPtr.Zero))
{
throw new Win32Exception();
}
try
{
if (User32.SetClipboardData(User32.CF.UNICODETEXT, memory) == IntPtr.Zero)
{
throw new Win32Exception();
}
// If SetClipboardData succeeds, we have transferred ownership of the memory.
// https://docs.microsoft.com/en-us/windows/desktop/api/Winuser/nf-winuser-setclipboarddata#parameters
memory.SetHandleAsInvalid();
}
finally
{
if (!User32.CloseClipboard())
{
throw new Win32Exception();
}
}
}
}
