3M™ MicroTouch™ Software MT 7 User Guide
37
3M Touch Systems, Inc. Proprietary Information – 25695K
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.
