>>I have this code in a prg.
>>
>>Define Class CodesMainTxtChar As textbox_char Of dataform
>>...
>>
>>EndDefine
>>
>>While compiling the project I receive this error:
>>
>>Program codesmain.prg has the following errors:
>> Program DATAFORM - Undefined
>>
>>I tried EXTERNAL CLASS dataform but I did not help.
>>How can I prevent this error?
>>
>>Thanks in advance
>>Anthony
>
>You have a classlib called dataform, which hold the textbox_char class?

Yes.