Manual Intermec 751G (page 113 of 156) (English)

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Chapter 3 — Configuring the Computer

751G Color Mobile Computer User’s Manual 99

• IOCTL_HAL_COLDBOOT

Forces a cold reboot. This resets the 751G, reloads Windows CE as if a

power-up was performed, and discards the contents of the Windows CE

RAM-based object store (page 74).

• IOCTL_HAL_WARMBOOT

Performs a system warm-boot, preserving the object store (page 73).

Reprogramming the 751G Keypad

Applications have the ability to remap keys on the 751G keypad. This

allows applications to enable keys that would otherwise not be available,

such as the [F1] function key. Also, to disable keys that should not be

available, such as the alpha key because no alpha entry is required. Use care

when attempting to remap the keypad because improper remapping may

render the keypad unusable. Cold-booting the device loads the default

keymap, thus correcting this situation.

Note that remapping the keys in this way affects the key mapping for the

entire system, not just for the application that does the remapping.

There are three “planes” supported for the 751G keypad. Keys used in

more than one shift plane must be described in each plane.

• The unshifted plane contains values from the keypad when not pressed

with other keys, such as pressing [1] to enter a “1.”

• The orange plane contains values from the keypad when a key is

simultaneously pressed with the [orange] key, such as pressing [orange]

[1] to enter a “Send” command.

• The alpha plane contains values from the keypad when the keypad is

placed in alpha mode by pressing the green [Alpha] key, such as pressing

[Alpha] [1] to enter a “Caps” command.

Key Values

Key values for each plane are stored in the registry. All units ship with a

default key mapping already loaded in the registry. Applications that wish

to change the default mapping need to read the appropriate key from the

registry into an array of Words, modify the values required and then write

the updated values back into the registry. The registry access can be done

with standard Microsoft API calls, such as RegOpenKeyEx(),

RegQueryValueEx(), and RegSetValueEx().

Note: Using IOCTL_HAL_REBOOT is no longer recommended, use

either IOCTL_HAL_WARMBOOT or IOCTL_HAL_COLDBOOT.

IOCTL_HAL_REBOOT is still supported for backward-compatibility but

its use can lead to difficulties.

Note: Use caution when remapping the keypad. Improper remapping may

render the keypad unusable. Data within the 751G could also be lost,

should any problems occur.

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Intermec 751G Manual

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