PANEL的DragOver 事件:xpanel:=x;ypanel:=y;

LABEL的MouseMove事件:xlabel:=x;ylabel:=y;

LABEL的EndDrag 事件:label.left:=xpanel-xlabel;label.top:=ypanel-ylabel;

[DELPHI]取得WINDOWS目录

uses shellapi;

var windir:array[0..255] of char;

getwindowsdirectory(windir,sizeof(windir));

或者从注册表中读取,位置:

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion

SystemRoot键,取得如:C:\WINDOWS

[DELPHI]在FORM或其他容器上画线

var x,y:array [0..50] of integer;

canvas.pen.color:=clred;

canvas.pen.style:=psDash;

form1.canvas.moveto(trunc(x[i]),trunc(y[i]));

form1.canvas.lineto(trunc(x[j]),trunc(y[j]));

[DELPHI]字符串列表使用

var tips:tstringlist;

tips:=tstringlist.create;

tips.loadfromfile('filename.txt');

edit1.text:=tips[0];

tips.add('last line addition string');

tips.insert(1,'insert string at NO 2 line');

tips.savetofile('newfile.txt');

tips.free;

[DELPHI]简单的剪贴板操作

richedit1.selectall;

richedit1.copytoclipboard;

richedit1.cuttoclipboard;

edit1.pastefromclipboard;

[DELPHI]关于文件、目录操作

Chdir('c:\abcdir');转到目录

Mkdir('dirname');建立目录

Rmdir('dirname');删除目录