Introduction
This is a port of Richard MacCutchan's Security Blackout Window to C#.
The sources are on Github.
Background
I did this as I wanted to see if it would work.
Using the Code
There are two methods that show the blackout window:
public static void Blackout(IntPtr hWnd, Action action);
public static T Blackout<T>(IntPtr hParentWnd, Func<T> func);
The second version (the generic one) is for doing something like:
BlackoutWindow.Blackout(SomeHandle, () => {
return MessageBox.Show("A Test", "A Test", MessageBoxButtons.YesNo);
});
Points of Interest
I was having the <Sarcasm> greatest </Sarcasm> time getting one of the structures (the WNDCLASSEX one) to marshal correctly in the RegisterClassEx method (damn those AccessViolationExceptions!) I finally ended up using an IntPtr as the argument to the method and using the Marshal class to marshal the structure to memory, which worked.
P/Invoke is useful, but can be a pain in the posterior sometimes.
History
- V 1.0 - 2014-12-19 - Initial version
- V 1.1 - 2014-12-19 - Added WPF Example
