By default, the Advantage Crystal Reports Driver uses the ADS_ANSI character type when opening .DBF tables. To force the Advantage Crystal Reports Driver to use the ADS_OEM character type, add the following two lines to your ads.ini file:
[Crystal]
CharType=2 ; ADS_ANSI=1 ADS_OEM=2
If specified in the [Crystal] section of the ads.ini file, the setting will be global for use by all reports. If instead you would like to add a per-alias Character Type, the following syntax can be used (and often will already exist in your ads.ini file, as this is the format the Advantage Data Architect uses to store additional alias information):
[<YourAliasName>_info]
CharType=ansi
Note when using a per-alias CharType, a string format is used, as opposed to 1 and 2 which are used in the global [Crystal] section.