>------------------
>nLayer = 1
>nColumn = 1
>store 0 to a,b
>store space(19) to c
>oObject.GetColumnDefinition(nLayer, nColumn, @a, @b, @c)
>
>-----------------
>function declaration from manual:
>
>C++
>void GetColumnDefinition (short nLayer, short nColumn,
> short lpDataType, short *lpnCount, BSTR *lpTitle)

The third parameter should not be passed by reference. FWIW, are these COM interface calls or what? COM manages passing by reference on its own, so you should not pass in anything with the @ in front of it. The string is definitely not passed in with a @.


+++ Rick ---

>
>Visual Basic
>GetColumnDefinition (ByVal nLayer As Integer;
>ByVal nColumn As integer;
>lpDataType As Integer; lpnCount As Integer;
>lpTitle As String)
>
>
>I also tried to call up the function with parameters by value or use createbinary() for the string. Same error. I suspect the string 'c' to be the problem because I can use other just numeric functions of the OCX without problems. Any ideas?
>
>Thanks!