Hi everybody! I need some help! I use the CX-Server 1.5 program with DDE manager 1.5.0.3 and Excel2000. How I can define a pushbutton in the Visual Basic? It must be change one bit in the PLC across DDE manager. (I don't know, it possible? I use a CQM1-CPU21 PLC). I need a short VB sample program! Sorry about my english! Best regards! Thomas