The Shell object represents a window-either a top-level window or a dialog window.
Shell Styles:
StyleDescription
BORDERAdds a border.
CLOSEAdds a close button.
MINAdds a minimize button.
MAXAdds a maximize button.
NO_TRIMCreates a Shell that has no border and can't be moved, closed, resized, minimized, or maximized. (Useful for splash screens).
RESIZEAdds a resizable border.
TITLEAdds a title bar.
DIALOG_TRIMConvenience style, equivalent to TITLE | CLOSE | BORDER.
SHELL_TRIMConvenience style, equivalent to CLOSE | TITLE | MIN | MAX | RESIZE.
APPLICATION_MODALCreates a Shell that's modal to the application. Note that you should specify only one of APPLICATION_MODAL, PRIMARY_MODAL, SYSTEM_MODAL, or MODELESS; you can specify more, but only one is applied. The order of preference is SYSTEM_MODAL, APPLICATION_MODAL, PRIMARY_MODAL, then MODELESS.
PRIMARY_MODALCreates a primary modal Shell.
SYSTEM_MODALCreates a Shell that's modal system-wide.
MODELESSCreates a modeless Shell.