Is it possible for an application to take ownership of a window from another application?

Question

Basically, I have two applications that run sequentially (second is started by the first, and the first exits immediately after.) I'd like to pass ownership of a window the first application created to the second application. The actual contents of the window don't need to be passed along, it's just being drawn in by DirectX.

Alternatively, but less desirably, is it possible to at least disable the window closing/opening animation, so it at least looks like the desired effect is achieved?

(This is in C, using the vanilla Win32 API.)

Answer 1

Instead of separated application make a DLL that will be loaded by the first application and run within it.

Answer 2

I suspect that you're going to run into problems because the WindowProc function is located in the memory address space of the program that you're closing.

Also, a quick look at the second remark at the bottom of the documentation for RegisterClass doesn't seem to offer up much hope.

The only work around that I can suggest for what you've described is to not close the first application until the second application is finished with the window in question.