SetClearA()  Sets the default colour for clear screen 
 Used as the default clear colour
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 Syntax

     SetClearA( [<cClearAttr | nClearAttr>] ) --> cNull

 Argument

     <cClearAttr | nClearAttr> is the colour used as a default clear
     colour. By default the clear colout is white on black - 7. This function
     accepts either a colour string or a numeric.

 %BReturns

     SetClearA() always returns a null string, or "".

 Description

     Set the Clear Attribute. this function allows you to change the default
     clear colour for functions that take advantage of SetClearA().

 Examples

     ■  The following demonstrate calling SetClearA()

        SetClearA(103)
        SetClearA("03/01")
        SetClearA("B+/GR")

 Files:  Library is MRWINDOW.LIB.