TerSetParaBkColor

Set the background color for the paragraph.

bool TerSetParaBkColor( dialog, color, repaint)

`bool dialog;`	true to show the dialog box for the user to select a background color. false to use the background color specified by the 'color' parameter.
`Color color;`	New background color for the paragraph.
`bool repaint;`	true to repaint the screen after this operation.

Return Value: This function returns true when successful