Updated readme.md

readme.md

@@ -1,6 +1,17 @@
 # PB-RawInput
+A module to access and use Windows' RawInput API.
 
-TODO
+## Usage
+Simply include "*[RawInput.pbi](Includes/RawInput.pbi)*" and use the structures, functions and datatypes documented on the [MSDN page](https://docs.microsoft.com/en-us/windows/win32/inputdev/raw-input.) with the `RawInput::` prefix.
+
+## Considerations
+* The module has not been tested on x86 platforms
+* Some structure fields may not be available on Windows XP, see Microsoft's documentation.
+* `GetRawInputDeviceInfoA` and `GetRawInputDeviceInfoW` are available under `GetRawInputDeviceInfo`.
+
+## Useful Links
+* MSDN page - https://docs.microsoft.com/en-us/windows/win32/inputdev/raw-input
+* MSDN page - https://docs.microsoft.com/en-us/windows/win32/inputdev/raw-input
 
 ## License
 [Unlicense](LICENSE)