Hi,
I've been tracking down the reason for bug 7993 ( http://bugs.winehq.org/show_bug.cgi?id=7993 , "Delta Force Land Warrior 1.31 -> Can't find 3D Video Card" ), and I think I've found it.
It appears as if the EnumDevices callback in Delta Force for some reason discards all devices with a GUID of IID_IDirect3DTnLHalDevice, thus discarding the only device enumerated by wine. This is "easily" checked (and bypassed) by searching for and altering the IID_IDirect3DTnLHalDevice value used in the check (78 9E 04 F5 (..) ) in the delta force executable.
While this works as a "fix", it's obviously not a good one. In my (somewhat limited and at the moment not doublechecked) understanding, windows "always" returns (at least) two devices, one reporting T&L capable and one not. So I am wondering how one would implement a proper fix for this in wine.
Fixing this together with applying (or otherwise fixing the issue highlighted in) the patch at http://flodaby.ath.cx/~david/0001-ddraw-fix-cases-where-desc2.u2.dwMipMapCou... (also sent to wine-patches), would enable both Delta Force Land Warrior and Delta Force Task Force Dagger to run great with wine.
David