Hardware functions alter the state of input devices and obtain state information. Windows uses the mouse and the keyboard as input devices. Following are hardware functions:
| Function | Description |
| EnableHardwareInput | Enables or disables mouse and keyboard input throughout the application. |
| GetAsyncKeyState | Returns interrupt-level information about the key state. |
| GetInputState | Returns nonzero if there is mouse or keyboard input. |
| GetKBCodePage | Determines which code-page tables are loaded. |
| GetKeyboardState | Copies an array that contains the state of each key. |
| GetKeyNameText | Retrieves a string specifying the name of a key from a list maintained by the keyboard driver. |
| GetKeyState | Retrieves the state of a virtual key. |
| MapVirtualKey | Accepts a virtual-key code or scan code for a key and returns the corresponding scan code, virtual-key code, or ASCII value. |
| OemKeyScan | Maps the ASCII values of OEM character codes 0 through 0x0FF into the OEM scan codes and shift states. For more information about the OEM character set, see the Microsoft Windows Guide to Programming. |
| SetKeyboardState | Sets the state of one or more keys by altering values in an array. |
| VkKeyScan | Translates a Windows character to the corresponding virtual-key code and shift state for the current keyboard. |
For detailed information about the hardware functions, see the Microsoft Windows Programmer's Reference, Volume 2.