Add usage and build info to readme

README.md

@@ -9,12 +9,30 @@ It handles local drives, network-mapped drives, and removable drives. This
 command takes no arguments.
 
 
-Building
---------
+Usage
+-----
 
-This project is managed with Visual Studio. It is built as a 64-bit application.
+```
+drives 1.0
+drives: Print drive and volume information.
+Usage:  drives [/?|-h|--help] [--version] [-v|--verbose] [-p|--parseable]
+        [drive]
 
-There's also a makefile that will build netuse, an experimental tool for now.
+Single letter options may use either dashes (-) or slashes (/) as option
+prefixes, and are case insensitive. This program also prints all network
+mappings and drive substitutions (see the 'subst' command).
+
+--help / -h       Print help information.
+
+--verbose / -v    Print verbose; print additional information (only affects
+                  human format).
+
+--version         Print program version.
+
+--parseable / -p  Print results in machine-parseable format.
+
+[drive]           Drive letter for single drive report.
+```
 
 
 Sample Output
@@ -28,6 +46,33 @@ Sample Output
     X: "Data"    3642-e068  Fixed     [NTFS] --> A:\setup\apps
 
 
+Developing
+----------
+
+This project is managed with Visual Studio. It is built as a 64-bit application.
+However, it is structured in a way that is friendly to add build setups from
+other environments. Here's the overall tree structure:
+
+    +---src
+    ^---build
+    |   ^---win
+    ^---out
+        ^---x64
+            ^---Debug
+            |   ^---intermediate
+            |       ^---drives.tlog
+            ^---Release
+                ^---intermediate
+                    ^---drives.tlog
+
+Pure source files are in the `src` directory. The `build` directory contains all
+of the configuration for build tools. For now, it just has the Visual Studio
+build environment, in `build/win`. All generated build output goes to the `out`
+directory (it's always safe to delete the entire `out` directory).
+
+There's also a makefile that will build netuse, an experimental tool for now.
+
+
 --------------------------------------------------------------------------------
 Steve Hollasch <[email protected]>  
 https://github.com/hollasch/drives