Hi. How could someone find out is someone is hooking you app.

I installed win spy++.

Now it has a button that is call flash this should flash where the apps window is so I did a test with note pad and If i move not pad around it only flashes where not pad is currently located on my desk top. But now if I do the same with my app the whole dest top flashes why.????

here screen shot of winspy++ there is all sorts of handles in the display panel.

There are several different ways, depending on the type of hook being used. An enormous amount of Windows functions allow programs to hook into them or intercept them or trace them or replace them, and it can happen at any level from drivers to debugging tools to running all of the OS inside a debugger-based virtual machine.

Many methods are completely undetectable by your application.