window functions
XgrClearWindow ( window, color )
XgrClearWindowAndImages ( window, color )
XgrCreateWindow (@window, winType, @xDisp, @yDisp, @width, @height, winFunc, display$ )
XgrDestroyWindow ( window )
XgrDisplayWindow ( window )
XgrGetWindowFunction ( window, @func )
XgrGetWindowIcon ( window, @icon )
XgrGetWindowPositionAndSize ( window, @xDisp, @yDisp, @width, @height )
XgrGetWindowState ( window, @state )
XgrGetWindowTitle ( window, @title$ )
XgrHideWindow ( window )
XgrMaximizeWindow ( window )
XgrMinimizeWindow ( window )
XgrRestoreWindow ( window )
XgrSetWindowFunction ( window, func )
XgrSetWindowIcon ( window, icon )
XgrSetWindowPositionAndSize ( window, xDisp, yDisp, width, height )
XgrSetWindowState ( window, state )
XgrSetWindowTitle ( window, title$ )
XgrShowWindow ( window )
 

XgrClearWindow  ( window, color ) 

XgrClearWindow() clears window to color . If (color=-1), the window is cleared to the same color as last time, or to black if it has not been cleared previously. XgrClearWindow() does not clear image grids associated with the window.
XgrClearWindowAndImages  ( window, color ) 

XgrClearWindowAndImages() clears window to color . If (color=-1), the window is cleared to the same color as last time, or to black if it has not been cleared previously. All image grids associated with a grid in the window are cleared to their current background color.