wkid (specified by user) (fullword integer)
The workstation identifier.

vldnr (specified by user) (fullword integer)
The valuator device number. GDDM-GKS provides only one valuator device at a workstation. The valuator device number is always 1.

ival (specified by user) (short floating point)
The initial value of the valuator device. This value must lie in the range set by the minimum and maximum values, loval and hival.

pet (specified by user) (fullword integer)
The prompt and echo type.

xmin (specified by user) (short floating point)

xmax (specified by user) (short floating point)

ymin (specified by user) (short floating point)

ymax (specified by user) (short floating point)
The echo area in device coordinates.

loval (specified by user) (short floating point)

hival (specified by user) (short floating point)
The minimum and maximum values defining the valuator range. The maximum value, hival, must be greater than the minimum value; loval; otherwise, error 146 is reported.

ldr (specified by user) (fullword integer)
The dimension of the data record array.

datrec (specified by user) (array of 80-byte character tokens)
The valuator data record array.

pet=1

Echo the current valuator value within the echo area.

The initial value is displayed as a string starting in the lower left corner of the echo area. The value can be overtyped by the operator with a number within the range loval through hival.

The data record is not used.

7

GKS not in proper state: GKS shall be in one of the states WSOP, WSAC, or SGOP

20

Specified workstation identifier is invalid

25

Specified workstation is not open

38

Specified workstation is neither of category INPUT nor of category OUTIN

51

Rectangle definition is invalid

140

Specified input device is not present on workstation

141

Input device is not in REQUEST mode

144

Specified prompt and echo type is not supported on this workstation

145

Echo area is outside display space

146

Contents of input data record are invalid

152

Initial value is invalid