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Pen.color:=clWhite;
pen.mode:=pmcopy;
pen.color:=clwhite;
MoveTo(20,20);
LineTo(200,200);
擦除
Pen.color:=*;//背景色
moveTo(20,20);
LineTo(200,200);
这样应该可以
pen.mode:=pmcopy;
pen.color:=clwhite;
MoveTo(20,20);
LineTo(200,200);
擦除
Pen.color:=*;//背景色
moveTo(20,20);
LineTo(200,200);
这样应该可以