On October 12, 2014 9:31:02 AM EDT, Man-wai Chang <changmw@gmail.com> wrote:

> According to http://fox.wikis.com/wc.dll?Wiki~VFPDataTypes

>

> create table ttt ( f1 g )

> append blank

> append general f1 from temp.txt

> use

> ll = fopen("F:\ttt.dbf",12)

> fseek(ll,43)

> fwrite(ll,'M')

> fclose(ll)

>

> It didn't work. When I USE ttt and DISPLAY STRU, it's still a General

> field.

>

> What's wrong with the sample codes?

Are you sure you opened the low level with write privileges? Fwrite will not error, it will return 0. My testing in VFP9 works.

--

Tracy

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