The WSHOW procedure exposes or hides the designated window.
Set this keyword to iconify the window. Set ICONIC to 0 to de-iconify the window.
Under windowing systems, iconification is the task of the window manager, and client applications such as IDL have no direct control over it. The ICONIC keyword serves as a hint to the window manager, which is free to iconify the window or ignore the request as it sees fit.