Determine which process is locking the clipboard

I was having a peculiar error where some process occasionally appeared to be using the clipboard when my application went to handle copy & paste operations. There are some retry work arounds, and I had an acceptable solution in place, but I wanted to locate which process it was if the error keeps occurring.

After some research and a little coding, I’ve wrapped my solution into an easy-to-use method (plus some declarations):

[DllImport("user32.dll", SetLastError = true)]
static extern IntPtr GetOpenClipboardWindow();

[DllImport("user32.dll", SetLastError = true)]
static extern int GetWindowThreadProcessId(IntPtr hWnd, out int lpdwProcessId);

private static Process GetProcessLockingClipboard()
    int processId;
    GetWindowThreadProcessId(GetOpenClipboardWindow(), out processId);

    return Process.GetProcessById(processId);


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