[SOLVED] how programatically set com ports for GPS in windows mobile

how programatically set com ports for GPS in windows mobile

In windows mobile, the GPS com port settings are done in start\settings\system\External GPS. However i want to make the above changes programatically. For this I compared the registry settings of the mobile before and after the settings, and now set them programatically:

[HKEY_LOCAL_MACHINE\System\CurrentControlSet\GPS Intermediate Driver]
"IsEnabled"=dword:00000001

[HKEY_LOCAL_MACHINE\System\CurrentControlSet\GPS Intermediate Driver\Drivers]
"CurrentDriver"="Control Panel Configured Device"

[HKEY_LOCAL_MACHINE\System\CurrentControlSet\GPS Intermediate Driver\Drivers\Control Panel Configured Device]
"Baud"=dword:0000e100
"CommPort"="COM8:"
"InterfaceType"="COMM"

[HKEY_LOCAL_MACHINE\System\CurrentControlSet\GPS Intermediate Driver\Multiplexer]
"DriverInterface"="COM0:"

[HKEY_LOCAL_MACHINE\System\CurrentControlSet\GPS Intermediate Driver\Multiplexer\ActiveDevice]
"Index"=dword:00000000
"Prefix"="COM"
"Context"=dword:12344160
"Flags"=dword:00000002
"Keep"=dword:00000001
"Dll"="GPSID.dll"

But even after doing these registry settings, the GPS port settings do not show in the "start\settings\system\External GPS", but I can still see them in the registry.

How do i make the changes to "start\settings\system\External GPS" settings programatically?

Solution

You have to call IOCTL_SERVICE_REFRESH on the intermediate driver after changing the registry settings. http://msdn.microsoft.com/en-us/library/bb202088.aspx

Also, you may find the MSDN documentation on the registry values themselves useful: http://msdn.microsoft.com/en-us/library/bb202016.aspx

-PaulH