I used a clean, offline Windows 7 SP1 PC and the resulting MAME.exe was shown as 80,565KB in explorer (the official exe is slightly smaller).
If any of these instructions are unclear, inaccurate or out-of-date or any of the links no longer work please let me know and I will update this tutorial
A new input method was introduced in MAME v0.118 which prevents the current version from working with Xpadder.
This also applies to MAME modifications such as MAMEUIFX32 and MESS.
Here is a detailed step-by-step tutorial for modifying MAME yourself to re-enable Xpadder support.
Stage 1: Prepare compilation environment (it's a lot easier than it sounds!)
No programs need installing and no changes are made to your system
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