Cicode Help

[ZhongJiwei]

Hello,
Any one no below function, i do not how to make it in Cicode. Please advise me.
FUNCTION MyTagWrite(TagName, NewValue, Message)
STRING OldValue;
OldValue = TagRead("Tagname")
Message("Are you sure you want to change Tagname from OldValue to NewValue?")
If OK
TagWrite(Tagname, NewValue)
DevOpen(Log device)
DevAppend..
DevSetField(Date/Time..
DevSetField(Username..
DevSetField(OldValue..
DevSetField(New Value..
DevSetField(Message.. eg "Pump 1 Run Control..."
DevClose..
Else
do nothing
End
End