gabriel7218-gcx/0xDEADDEAD ? reverse-engineered prompt

Build me a small Windows prank app in C++ that uses the Win32 API and GDI to do fun screen effects like rainbow colors, flashing visuals, and other random visual glitches. I want it to pop up a few annoying message boxes, play some sound effects, and use multiple threads so the effects can happen at the same time.

Please make it work as a single Windows program that can be built with a MinGW w64 toolchain, and keep it compatible with older and newer Windows versions if possible, like XP, 7, and 10. The behavior should feel random and a little chaotic, like a simple prank or experimental graphics demo. If you need to check anything, look up current docs online.