Sent to a WIMMessageCallback function to indicate that a drive is being scanned during a cleanup operation.
WIM_MSG_CLEANUP_SCANNING_DRIVE wParam = (WCHAR) DriveLetter; lParam = (DWORD) 0;
Parameters
wParam
[in] Specifies the driver letter being scanned during a cleanup operation.
lParam
[in] Unused.
Return Value
Your routine must return WIM_MSG_SUCCESS.