Use the Window Api Code Pack to implement jump lists.
A good start would be to add a task for each type of diagram, similar to this picture:
https://i.stack.imgur.com/ItoPT.jpg
If there is an open project, the chosen diagram will be added to the project, otherwise an empty, untitled project will be created and the diagram will be added to it.
The jump list should also contain a list to the most recent project files.
Use the Window Api Code Pack to implement jump lists.
A good start would be to add a task for each type of diagram, similar to this picture:
https://i.stack.imgur.com/ItoPT.jpg
If there is an open project, the chosen diagram will be added to the project, otherwise an empty, untitled project will be created and the diagram will be added to it.
The jump list should also contain a list to the most recent project files.