The Developer's Reference
Writing Mathcad DLLs
    Creating Mathcad-Readable Function Libraries
    Registering Your Function with Mathcad
    Creating Help for your Functions
    Error Messages
       Creating an Error Message Table
    Interrupting Calculation
    Compiling and Linking Your DLL
    Listing your Functions in the Insert Function Dialog Box
    Structure and Function Definitions
    Using FORTRAN in Your DLL
The Data Acquisition Control
Scripting Custom OLE Objects
Mathsoft Controls
Automation Interfaces
The Component SDK