nsPIXPIProxy Interface

 Puts up an alert dialog with an OK button.

 @param title
        Text to appear in the title of the dialog.
 @param text
        Text to appear in the body of the dialog.

void alert(in wstring title, in wstring text)

 Puts up a dialog with up to 3 buttons and an optional, labeled checkbox.

 @param aDialogTitle
        Text to appear in the title of the dialog.
 @param aText
        Text to appear in the body of the dialog.
 @param aButtonFlags
        A combination of Button Flags.
 @param aButton0Title
        Used when button 0 uses TITLE_IS_STRING
 @param aButton1Title
        Used when button 1 uses TITLE_IS_STRING
 @param aButton2Title
        Used when button 2 uses TITLE_IS_STRING
 @param aCheckMsg
        Text to appear with the checkbox.  Null if no checkbox.
 @param aCheckState    
        Contains the initial checked state of the checkbox when this method
        is called and the final checked state after this method returns.

 @return index of the button pressed.

 Buttons are numbered 0 - 2. The implementation can decide whether the
 sequence goes from right to left or left to right.  Button 0 is the
 default button unless one of the Button Default Flags is specified.

 The value for aButtonFlags is constructed using the constants defined by
 nsIPromptService.

 @see nsIPromptService

PRInt32 confirmEx(in wstring aDialogTitle, in wstring aText, in unsigned long aButtonFlags, in wstring aButton0Title, in wstring aButton1Title, in wstring aButton2Title, in wstring aCheckMsg, inout boolean aCheckState)