3M MT7 Slow Draw Anomalies

3M™ MicroTouch™ Software MT 7 User Guide 37
3M Touch Systems, Inc. Proprietary Information – 25695M
Slow Draw Anomalies
Using Draw mode can be slow on certain Windows® CE machines. For example,
drawing a curve inside a draw application may produce ragged lines and the cursor may
lag behind. The "IOPollDelay" parameter adjusts the behavior of draw mode. Adjusting
the default value of this parameter may improve the behavior and appearance of the
curve without affecting overall performance of the Windows® CE system. You can add
this parameter to the system by editing the text file TwParams.reg found in
C:\MT7_CE\x86. To add this parameter with a new default value insert the IOPollDelay
line after the line below:
[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\TwTouch\Parameters]
"IOPollDelay"=dword:1(value)
A value between 1 and 20, such as 10 may work best for your particular application.
After adding or modifying the value of this parameter, you need to rebuild the
Windows® CE image and test the draw behavior.