How to show uses of function in Visual Studio Code?

There are several ways to display function usage in Visual Studio, and I will describe them one by one:

1. Find All References

• Steps:
  1. Place the cursor on the function name.
  2. Right-click and select "Find All References" (or use the shortcut Shift + F12).
  3. Visual Studio will display a window listing all references to the function, including the calling files and line numbers.

2. Call Graph

• Steps:
  1. In the "View" menu, select "Other Windows" > "Call Graph".
  2. In the Call Graph window, find and select the function you are interested in.
  3. Right-click the function and select "Add All Callers".
  4. The Call Graph will expand to show all methods and functions calling this function.

3. Call Hierarchy

• Steps:
  1. Place the cursor on the function name.
  2. Right-click and select "Call Hierarchy" (or use the shortcut Ctrl + K, Ctrl + T).
  3. The Call Hierarchy window will appear, showing the call hierarchy of the function.

4. Global Search

• Steps:
  1. Open Global Search using Ctrl + Shift + F.
  2. Enter the function name and set appropriate search parameters (e.g., solution scope).
  3. Review the search results, which will show all code lines containing the function name.

Example:

Suppose we have a function named calculateInterest. We can use one of the above methods to find all places in the project where this function is used. Using "Find All References" quickly provides a list showing which files call calculateInterest and on which lines. This is very helpful for refactoring or understanding the code flow.

All these methods can help developers effectively track and understand function usage in Visual Studio. This is particularly important for large projects or in collaborative environments.