
ISKEYDOWN
Syntax: ISKEYDOWN(key_id);
Returns true (non-zero) if the key whose key_id is provided is currently pressed, and false (0) if it is not.
MOUSE
Syntax: MOUSE[(index)]
Returns two lists describing the current location of each potential pointer (or empty lists if the pointers are
not used). The output is {x , y, original x, original y, type} where type is 0 (for new), 1 (for completed), 2 (for
drag), 3 (for stretch), 4 (for rotate), and 5 (for long click).
The optional parameter index is the nth element that would have been returned—x, y, original x, etc.—had
the parameter been omitted (or –1 if no pointer activity had occurred).
MSGBOX
Syntax: MSGBOX(expression or string [ ,ok_cancel?]);
Displays a message box with the value of the given expression or string.
If ok_cancel? is true, displays the and buttons, otherwise only displays the
button. Default value for ok_cancel is false.
Returns true (non-zero) if the user taps , false (0) if the user presses .
EXPORT AREACALC()
BEGIN
LOCAL radius;
INPUT(radius, "Radius of Circle","r = ","Enter radius",1);
MSGBOX("The area is " +π*radius^2);
END;
If the user enters 10 for the radius, the message box shows this:
Program commands 609
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