procedure clearcanvas(Acanvas:Tcanvas); var R:Trect; begin with Acanvas do begin Brush.Style:=bsSolid; Brush.Color:=clWhite; GrtWindowsRect(Handlr,R); R.topleft:=screentoclient(R.topleft); R.Bottonright:=screentoclient(R.bottomright); Fillrect(R); end; end;
宠辱不惊,看庭前花开花落,去留无意;毁誉由人,望天上云卷云舒,聚散任风。
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var
R:Trect;
begin
with Acanvas do
begin
Brush.Style:=bsSolid;
Brush.Color:=clWhite;
GrtWindowsRect(Handlr,R);
R.topleft:=screentoclient(R.topleft);
R.Bottonright:=screentoclient(R.bottomright);
Fillrect(R);
end;
end;
错了,
GetWindowsRect(Handle,R);
begin
brush.color:=背景色;
fillrect(rect(0,0,width,height));
end;