FILE: Joyflt.exe Contains Joystick and Keyboard Filter Drivers

• Microsoft Win32 Device Development Kit (DDK) for Windows NT, versions 3.1, 3.5, 3.51, 4.0

SUMMARY

Joyflt.exe is a driver that is actually two filter drivers in one. The first driver is set on top of the joystick driver and examines the data returned by the joystick driver. The second filter is set on top of the keyboard class driver. It adds raw keystrokes to the keyboard buffer.

If the joystick filter detects that a button has been pressed, the keyboard filter driver adds the appropriate raw keystroke to the keyboard buffer. For example, pressing button two on the joystick causes the letter "g" to be put in the keyboard buffer. In a flight simulation, the letter "g" is often used to raise and lower the landing gear. Now a user does not have to remove his or her hand from the joystick to press the letter "g." Instead, you can accomplish this by pressing button two on the joystick. The joystick filter detects this and the keyboard filter pushes the "g" onto the keyboard buffer.

The following file is available for download from the Microsoft Software Library:

 ~ Joyflt.exe (size: 22546 bytes) 

   ARTICLE-ID: Q119591
   TITLE     : How to Obtain Microsoft Support Files from Online Services

Keywords          : NTDDKInput
Version           : WINNT:3.1,3.5,3.51,4.0
Platform          : winnt