Objective:

First, I should say what I want to do, and then I'll describe what I've done to achieve to my Goal in the next (Descriptions) part.

I want to create a Custom List Master Shape from the Plain Container of the Diagram Parts section in the Insert tab of the ribbon. Then, I want to create another Master Shape that can use as the member shape for the Created Custom List Master Shape.

In other words, I want to add my Created Master Shape to my Custom List Master Shape like attaching the Member and Separator Master Shapes to the Class Master Shape of the UML Stencil.

So, I've faced with some problems in achieving to my Goal that I've described them in the next parts.

I'ts just a bit hard to understand what are you trying to do. Of course you did a good job of providing information, but it might be there is a bit too much of it.

Also, the questions starting with "Why.." may not be that good for a forum :D - they are rather philosophical. It might be easier if you start your question with "how do I... <do a certain thing>", and describe your goal so to say, i.e. what you are actually trying to accomplish.

Thank you for your Good Suggestions.
I'd improve my question now.

Meanwhile, here are some links to the official Microsoft Visio blog which may be helpful in developing custom lists/containers:

Adding Structure to Diagrams in Visio

Custom Containers, Lists and Callouts in Visio

Thank you for your Reply again; however, I've read them before.

I've created My Custom List Master Shape by what is described in those Internet Addresses; however, I can't achieve to my Goal :(

Furthermore, I improved my Question as you referred in your Prev. Reply.

Mohsen, please don't edit your question, first, our responses may not now make sense, and second, we read the original and tried to understand it, we can't see what parts you changed, so we stand no chance at all.

Thank you for your Advice again.

However, I did it according to one of the Prev. Nikolay Belyh Replies.

"and describe your goal so to say, i.e. what you are actually trying to accomplish."

Answer of 1st Question:

This problem always is for don't attend to the "Category" word. In most cases, people don't attend to that word and use the "Shape Master Name" instead of "Shape Category"; however, they're different with each other.

In my case, I was being entered the Shape Master Name (Property) for User.msvSDContainerRequiredCategories (A semicolon-delimited list of category names. Other shapes must have at least one matching name to be allowed as container members.) and User.msvSDListRequiredCategories (A semicolon-delimited list of category names. Other shapes must have at least one matching name to be allowed as list members.) instead of Shape Category (User.msvShapeCategories = Member).

Figure 1 - Comparing "Shape Master Name" with "Shape Category"