I am programming with VB.NET (VS .NET 2003). My VB-application makes calls to many external FORTRAN-routines. I collected these FORTRAN-routines in two DLL's, the simulation- and graphic-module.
The graphic module does some drawings using the DC of a picturebox control. I use an internal write to put some numbers on the axis and the graphs. It looks like:
Everything worked fine using CVF 6 + VB 6 and also using VB 6.0 and IF7/8. Now I am using IF 9 and VB.NET. My VB.NET application crashes right during the internal write with
System.NullReferenceException: Object reference not set to an instance of an object
Does anybody have a hint for me.
Many thanx in advance
Message Edited by OliverK on 03-02-2006 05:55 AM