The driver installed but the device failed with Code 31
(CM_PROB_FAILED_ADD): VhfCreate returned STATUS_INVALID_DEVICE_REQUEST
(0xC0000010) because vhf.sys was never attached beneath the FDO. Add the
required LowerFilters=vhf AddReg to the INF so VHF loads as a lower
filter; the device now starts clean and enumerates in joy.cpl.
A VHF virtual HID device cannot supply a HID product string (VHF_CONFIG
has no string field and VHF owns IOCTL_HID_GET_STRING), so register the
DirectInput OEMName (VID_1209&PID_5249 -> RIOJoy Virtual Gamepad) in
install.ps1 -CreateDevice and remove it in uninstall.ps1, giving the
controller a proper name instead of the generic VHF default.
Also fix a non-ASCII em-dash in sign.ps1 that broke parsing under
Windows PowerShell 5.1 (UTF-8 without BOM), and document the Code 52 /
Code 31 / friendly-name troubleshooting in driver/README.md.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
CydandClaude Opus 4.8
38ffb27458