Release 10.1A: OpenEdge Development:
Internationalizing Applications

Using the 4GL

Besides using the keyboard and possibly the mouse to enter multi-byte characters, you can also use the Progress 4GL.

Using the 4GL to simulate inputting double-byte characters

To input a double-byte character using the 4GL, assemble the character using the CHR function, whose syntax is:

Syntax

CHR ( expression [ , target-codepage [ , source-codepage ] ] )

The following example creates and displays the double-byte character. It is from the KSC5601 code page, which supports Korean:

DEFINE VARIABLE Double-byte-char as CHAR. Double-byte-character = CHR( (236 * 256) + 237 ). DISPLAY Double-byte-char WITH 1 COLUMN.

In the preceding example, the second line shifts the first value into the lead byte and adds the second value to the trail byte.

Note: The preceding example assumes the internal code page (-cpinternal) is set to KSC5601.

Using the 4GL to simulate key presses and mouse clicks

Besides using the Progress 4GL to simulate the input of characters, including multi-byte characters, you can also use the 4GL to simulate key presses and mouse clicks in a multi-byte environment.

Table 8–2 describes the 4GL elements involved and the multi-byte support provided by each.

Table 8–2: 4GL elements that simulate key presses and mouse clicks 

4GL element	Description	Example	Multi-byte support
APPLY statement	Applies an event to a widget or a procedure.	APPLY "CHOOSE" TO order-amt IN FRAME x.	The name of the event can contain multi-byte characters.
LASTKEY function	Returns, as an integer, the key code of the most recent keyboard or mouse event. LASTKEY returns values only after the input method places the data into the keyboard buffer.	IF LASTKEY = KEYCODE("F9")...	The key sequence can be a multi-byte character.
READKEY statement	Reads one keystroke from an input source and sets the value of LASTKEY to the keystroke’s keycode.	READKEY.	The key sequence can be a multi-byte character.