GDDM-GKS V1R1 Programming Guide and Reference
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GQCHB

GDDM-GKS V1R1 Programming Guide and Reference
SC33-0334-00
Purpose
 GQCHB  (errind, chbx, chby)
   
 APL code  1439
 GKS RCP code  X'38008D00' (939560192)
   
Function: To inquire character base vector.
Inquiry function. Returns the current character base vector from the GKS state list.
Parameters

errind (returned by GDDM) (fullword integer)
The error indicator.

chbx (returned by GDDM) (short floating point)

chby (returned by GDDM) (short floating point)
The character base vector in world coordinates.
Operating states
GKOP, WSOP, WSAC, SGOP
Related functions
Set character up vector (GSCHUP)
Description
If the inquired information is available, it is returned as output, and errind is returned as 0 (zero). If the inquired information is not available, all output is invalid, and errind returns an error indicator.
The character base vector is a vector giving the direction of the baseline of a character. It is set implicitly by the Set character up vector (GSCHUP) function.
Principal errors
8
GKS not in proper state: GKS shall be in one of the states GKOP, WSOP, WSAC, or SGOP

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