Returns TRUE if X1,Y1 and X2,Y2 are equal, otherwise it returns FALSE

EqualPt(X1,Y1,X2,Y2 : REAL) : BOOLEAN;

Returns TRUE if the two rectangular boundaries, X1,Y1,X2,Y2 and X3,Y3,X4,Y4 are equal, otherwise it rturns FALSE

EqualRect(X1,Y1,X2,Y2,X3,Y3,X4,Y4 : REAL) : BOOLEAN;

Given two rectangular boundaries, specified by X1,Y1,X2,Y2 and X3,Y3,X4,Y4 and returns a new boundary which encloses both rectangles in X5,Y5,X6,Y6

UnionRect(X1,Y1,X2,Y2,X3,Y3,X4,Y4 : REAL;  VAR X5,Y5,X6,Y6 : REAL);

Returns TRUE if the coordinate X,Y is located within the rectangular boundary specified by X1,Y1 and X2,Y2 otherwise it returns FALSE

PtInRect(X,Y,X1,Y1,X2,Y2 : REAL) : BOOLEAN;

Returns the distance between two coordinate locations

Distance(X1,Y1,X2,Y2 : REAL) : REAL;

If point X,Y is inside the polygon that is conected to the handle TRUE will be returns else it will return FALSE

PtInPoly(X,Y : REAL;  H : HANDLE) : BOOLEAN;