Due to a spinal cord injury, my daughter uses alternative input access for her computers. It is a HID USB compliant device with audio feedback. It emulates both keyboard and mouse. It works well in Windows XP SP3, but in Windows 7 x 32 there is a constant half-second delay of the movement of the mouse cursor after the audio feedback confirming the command. The cursor stops the movement immediately without the delay when the audio feedback confirms the command.
The HID is operated by two switches. The switches emulate Morse code input. Inputs are decoded and sent via USB. The HID works either in the keyboard mode, or in the mouse mode. The mouse mode uses "mouse keys codes" to operate. Both input modes are set by input codes and have to be switched.
Is there any way to shorten the delay before the cursor starts to move?