我的主页: http://www.tommstudio.com/
使用下面的方法可以让控件在运行状态改变大小,就像在窗体编辑器中一样.
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type
tddhsizebutton= class (tbutton)
public
procedure WmNcHitTest( var msg:TWmNcHitTest);
message wm_NcHitTest;
end ;
procedure TDdhSizeButton.WmNcHitTest( var msg:TWmNcHitTest);
var
pt:tpoint;
begin
pt:=point(msg.xpos,msg.ypos);
pt:=ScreentoClient(pt);
if (pt.x<5) and (pt.y<5) then
msg.Result:=httopright
else if (pt.x>width-5) and (pt.y<5) then
msg.Result:=httopright
else if (pt.x >width-5) and (pt.y>height-5) then
msg.Result:=htbottomright
else if (pt.x<5) and (pt.y>height-5) then
msg.Result:=htbottomleft
else if (pt.x<5) then
msg.Result:=htleft
else if (pt.y<5) then
msg.Result:=httop
else if (pt.x>width-5) then
msg.Result:=htright
else if (pt.y>height-5) then
msg.Result:=htbottom
else
inherited ;
end ;