If I want to create a custom version of the Share Page (The form you get displayed when you click the "Share" button) is there a way of inheriting the SharePage and add my functionality on top of it ?
For example ther is a variable called m_auim which tells me what sort of Share is being asked for (Document, List, List item etc. This is actually defined in CBasePageAcl.cs which inherits (in C#) from WebAdminPageBase. I want to be able to access this variable to see what sort of Share is required and act upon it if it is a particular value (or values). I can do this in C# but how do I do this in TypeScript ?