There are five types of <MessageWindow />, as presented in the first page:

• "info" window - a simple window with an Ok button. onOkButtonClick will be called on click on this button.
• "warning" window - a window with an Ok button. onOkButtonClick will be called on click on this button.
• "question" window - a window with an Yes and No buttons. onYesButtonClick and onNoButtonClick will be called on click on this buttons.
• "error" window - a window with an Ok button. onOkButtonClick will be called on click on this button.
• "yesNoCancel" window - a window with three buttons: Yes, No and Cancel. onYesButtonClick, onNoButtonClick and onCancelButtonClick will be called on click on this buttons.

Each button has a callback function, called on click on the button. The following example shows how the onOkButtonClick callback works. More details in the api section.