Readme file for using Symantec C/C++ Compiler version 6.0 to build 
user DLLs for Mathcad.

The instructions below apply to the Integrated Development and 
Debugging Environment IDDE.

To build a sample: (samples are under SOURCES subdirectory of your 
compiler directory) 
Symantec IDDE projects generally have many files associated with 
them.  The samples each have 6 project files in addition to the .c 
source files.  To build a sample project just start the IDDE, open the 
project and Rebuild it.

How to build a new project in the Integrated Development and 
Debugging Environment IDDE:

Start a new project:
Choose a path and name for the project file.
Add your source files to the project. (If you have not created them yet 
you can add them later)
Add the library file MCADUSER.LIB in the SYMANTEC\LIB 
directory to the project.

In the Options Project dialog box choose Win32s DLL.

In the Options Directories dialog box add the directory where the 
include file MCADINCL.H for SYMANTEC is located, e.g. 
C:\WINMCAD\USEREFI\SYMANTEC\INCLUDE  (or 
..\..\INCLUDE in relative notation for the samples) to the Include 
path.

Now you are ready to build the DLL.  You can do this by choosing 
"Build all" under menu  option Project.
  
After building you have to move the DLL to the USEREFI directory 
under MATHCAD's  home directory, e.g. C:\WINMCAD\USEREFI. 


Comments:
In the source file:
The DLL entry point can be called anything you want, e.g. 
DllEntryPoint.  But you need a pragma directive to declare the name 
to the linker.  So if it is called DllEntryPoint insert the following line 
right after the function definition:

#pragma startaddress(DllEntryPoint)

Alignment:
The default structure alignment for Win32s applications in Symantec 
is 8 byte alignment

For more information see the sample source files and the readme.txt 
file in USEREFI subdirectory.