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MNEMONIC |
Define File Command Sequence |
MNEMONIC [(chan)]mnm_name$=esc_sequ$
Where:
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chan |
Channel or logical file number for which the mnemonic is defined. |
|
mnm_name$ |
Valid mnemonic name, enclosed in apostrophes. String expression. |
|
esc_sequ$ |
Escape or command sequence required by the file/device in order to process the mnemonic. String expression. |
Use the MNEMONIC directive to define additional mnemonics for files and/or devices. Once you define a mnemonic for a given logical file number, it stays active until the channel is closed. When PxPlus encounters a user-defined mnemonic in a PRINT or INPUT statement, it converts the mnemonic to the character string in the escape sequence.
WindX supports the use of this MNEMONIC directive via the [WDX] tag. After opening a channel across a WindX connection, all declared mnemonics (except '*R' and '*X') are sent automatically to the WindX workstation. PxPlus considers the '*R' and '*X' mnemonics to be local to the server unless you use the [WDX] tag in declaring them. ('*R' declares an operating system command to execute on channel close, and '*X' declares a program to call on channel close.)
Example:
This is an example of the EXECUTE command under WindX (prior to v4.20):
if WDX%<>$00$
then execute "[WDX]mnemonic(lfo)'5X'=$1B+hex$"
else goto MY_LABEL
[WDX] Direct Action to Client Machine
Mnemonics
To define and use a mnemonic:
open (1)"/dev/printerxx"
mnemonic 'US'=esc+"_" ! Define mnemonic
…
print (1)'US',"Title line...", ! Underscored
The example below illustrates how the MNEMONIC directive can be used for flexible text fonts on a screen in Windows. Define the font and the logical screen size in a statement. To assign settings for the PxPlus standard mnemonics 'CP' and 'SP':
mnemonic (0)'CP'="Courier New,-8":120,40
mnemonic (0)'SP'="*":80,25
A subsequent PRINT 'CP' directive will change the screen font to Courier New with a size of 8 points, and PRINT 'SP' will restore the screen font to standard print.
open (chan)"[WDX]\\mach\printer_share"
mnemonic (chan)'FF'=$0C$ ! automatically goes to WindX workstation
mnemonic (chan)'*R'="erase "+filename$ ! local to server, not workstation
mnemonic (chan)'*R'="[WDX]erase "+filename$ ! on workstation, not server