What could be the reason of exception at IDirect3DDevice9::Reset?

Question

My employer asked me to fix annoying crashes in legacy Direct3D9 application. Calls to IDirect3DDevice9::Reset method(while "Alt-Tabing") in fullscreen mode raise exception. DirectX 9 documentation says nothing about possible exception in IDirect3DDevice9::Reset. Here is my D3DPRESENT_PARAMETERS input parameter:

Codebase is HUGE and I have only minor OpenGL skills. Wasted some night already. Just have no idea where to search for error.

@TedLyngmo Thank you, comrade! Your tip about `FullScreen_RefreshRateInHz`is where error was hidden! My Mom always says attention deficit is key of 95% of my problems — Debrovski, Aug 22 '19 at 21:45

score 3 · Accepted Answer · answered Aug 22 '19 at 21:47

This looks suspicious: FullScreen_RefreshRateInHz: "For full-screen mode, the refresh rate is one of the refresh rates returned by EnumAdapterModes".

Perhaps 0 means something else than 0 Hz but if it doesn't, that could definitely be the cause of a division by zero

What could be the reason of exception at IDirect3DDevice9::Reset?

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