MQL4 FileOpen function

[owkenobi]

Hi guys,
I need to add data to an existing file, a cvs file.

On MQL4 reference I found that "If there is a need to add data to an
existing file, it must be opened using combination of FILE_READ |
FILE_WRITE." but does not work.

Every time I launch Metatrader the file reset to zero-length.

Anyone has properly did it?

Thank you in advance,
Obi Wan.

[gazuz]

How bout just opening it in Excel (or Openoffice's replica of it) and just copy pasting the cells?

However for the zero length I have never heard of it before.. do you mean all your data for that currency pair that you modified dissapeared?