Wrapper function to display a TaskDialog with specific TCustomButtons. Create a dialog that displays like the real TaskDialog on a supported operating system. If the operating system does not support the TaskDialog API, then the TaskDialogEmulated function is called.

function TaskDialogEx(aOwner: TWinControl; const aTitle: TJSString; const aMainInstruction: TJSString; const aContent: TJSString; aIcon: Integer; aButtons: TCommonButtons): Integer;