Adding the DMD's location to the Windows' "PATH" environment variable.

• Since Windows searches for executables in the following pattern, we want to setup
  item "d" so that the D compiler can be found no matter where we're at within
  Windows' filing system trying to compile a D program:
  
  
  • a. The Current / Local Directory that the search started at
  • b. The Windows\System32 (WinNT\System32 on NT/Win2000) Directory
  • c. The Windows (WinNT on NT/Win2000) Directory
  • d. Then it follows the "PATH" environment variable
  • e. And if not found at this point a "File not found" appears.
  
  
• 1. Click on the [Start] menu button (normally it's green),
  and from there click on the [Control Panel] menu item
  
  
  
  
• 2. From the [Control Panel] click on the [System] selection, but you
  may need to first switch into classic mode. Of course, if you'd rather not do that,
  click on [Performance and Maintenance] and then click on the [System] item.
  
  
  
  
  
  
• 3. Within [System] select the [Advance] tab, and then click on
  the [Environment Variables] button.
  
  
  
  
• 4. From the [Environment Variables] dialog-box, scroll through the items in the
  [System variables] list-box until the "Path" entry is found. Then click once on
  the "Path" entry to select it, lastly click on the [Edit] button.
  
  
  
  
• 5a. Once the [Edit System variable] dialog-box opens up, click on the [variable value]
  edit-box, then place your cursor on the very end of the current contents.
  
  
  
  
• 5b. Then add in D's current drive and path for the compiler, which normally is
  "C:\dmd\bin", and also, add the Digital Mars C++ compiler / linker path as well, which
  normally at "C:\dm\bin". Once that's done, click on [Ok] button, and exit out of the
  [Environment Variables], [System], and [Control Panel] windows.