BUTTON
This statement adds a button that has a text label to a window created with the OPEN command. To include an ampersand in the label, double the ampersand.

Button commands:
print #handle.ext, "string"
This command changes the caption of the button.

print #handle.ext, "!setfocus"
This command gives the button the input focus.

print #handle.ext, "!font facename pointSize"
This command sets the button's font.

print #handle.ext, "!enable"
This causes the control to be enabled.

print #handle.ext, "!disable"
This causes the control to be inactive and grayed-out.
