The AutoCAD .net/ObjectARX APIs have a handy feature all the pick first selection. This means that prior to running a command, the user is able to select some objects in the model. The command is then able to use these objects. The question is, how to obtain a selection of objects using the Tekla API – prior to running your plug-in?
It’s really simple (if you already know how):
And that’s all it is! Hope this helps.