Hello Squarewave24,

Thank you for the provided information.

I am glad that we were able to solve your issue through our live LogMeIn session.

Please fell free to let us know if you have any other questions.

i tried adding toolbox items manually. 

your instructions go up to creating new tab, but you don't specify what assemblies i need to add.

my only aim, is to be able to edit infragistics grid, using infragistics design tools.