Intermec 700 Color Manual de usuario descargar pdf (Pagina 242)

ProgrammingChapter —7

224 700 Series Color Mobile Computer User’s Manual

Alpha (Blue) Plane

The alpha plane contains values from the keypad when the keypad has

been placed in alpha mode by pressing the blue alpha key, such as:

Press the Keys

Numeric Keypad Alphanumeric Keypad To Enter This

[Alpha] F 1 [Alpha] dg

Caps

[Alpha] F 5 [Alpha] dJ

[Alpha] F 9 [Alpha] dW

Key Values

Key values are stored in the registry. All units ship with a default key

mapping in its registry. Applications 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 v alues back into the

registry. The registry access can be done with standard Microsoft API calls,

such as RegOpenKeyEx(), RegQueryValueEx(), and RegSetValueEx().

Numeric Keypad

The following registry keys contain the plane mappings:

S The unshifted plane mapping can be found in the registry at:

HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\KEYBD\Vkey

S The gold plane mapping can be found in the registry at:

HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\KEYBD\VkeyGold

S The alpha plane mapping can be found in the registry at:

HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\KEYBD\VkeyAlpha

Alphanumeric Keypad

The following registry keys contain the plane mappings:

S The unshifted plane mapping can be found in the registry at:

HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\KEYBD\ALPHA\Vkey

S The gold plane mapping can be found in the registry at:

HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\KEYBD\ALPHA\VkeyGold

S The alpha plane mapping can be found in the registry at:

HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\KEYBD\ALPHA\VkeyAlpha

How Key Values Are Stored in Registry

To know which fields to update in the registry, you must know what Scan

Codes are assigned to each physical key (see the “Keypad Scan Codes and

Meanings” table on the next page). The Scan Code is used at the lowest

level of the system to let the keypad driver know which physical key has

been pressed. The keypad driver takes that scan code and looks it up in a

table (a copy of the one stored in the registry) to determine which values

to pass on to the operating system.

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Intermec 700 Color Manual de usuario Pagina 242