Progress
Language Reference
CAN-QUERY Function
Returns a logical value indicating whether you can query a specified attribute or method for a specified widget.
SYNTAX
widget-handle
An expression that evaluates to a widget handle. The handle must refer to a valid widget.
attribute-name
An expression that evaluates to a character-string value. The contents of the string must be an attribute or method name. For more information on attributes, see the Attributes and Methods Reference.
EXAMPLEThe following example prompts for a widget type and an attribute. It creates a widget of the specified type and passes a handle to that widget and the attribute you specified to the CAN-QUERY and CAN-SET functions. Then it reports whether the attribute can be queried or set for that widget.
NOTE
SpeedScript — Use with buffer-field, buffer-object, and buffer, and query-object handles.
SEE ALSO
CAN-SET Function, LIST-QUERY-ATTRS Function, LIST-SET-ATTRS Function
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