Description This method shows or hides the modeless thumbnail dialog.
Usage RetVal = [BiThumbnail.]ShowModelessThumbnailDlg thumbHandler showWnd
Remarks RetVal LONG 1 if show / hide of the window is successful.
thumbHandler LONG Thumbnail handler.
showWnd LONG true - show window; false - hide window.
See Also DisplayThumbnailDlg, CreateModelessThumbnailDlg