◇[DELPHI]产生鼠标拖动效果
通过MouseMove事件、DragOver事件、EndDrag事件实现,例如在PANEL上的LABEL:
var xpanel,ypanel,xlabel,ylabel:integer;
PANEL的MouseMove事件:xpanel:=x;ypanel:=y;
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]处理文件属性
attr:=filegetattr(filelistbox1.filename);
if (attr and faReadonly)=faReadonly then ... //只读
if (attr and faSysfile)=faSysfile then ... //系统
if (attr and faArchive)=faArchive then ... //存档
if (attr and faHidden)=faHidden then ... //隐藏
◇[DELPHI]取得系统运行的进程名
var hCurrentWindow:HWnd;szText:array[0..254] of char;
begin
hCurrentWindow:=Getwindow(handle,GW_HWndFrist);
while hCurrentWindow <> 0 do
begin
if Getwindowtext(hcurrnetwindow,@sztext,255)>0 then listbox1.items.add(strpas(@sztext));
hCurrentWindow:=Getwindow(hCurrentwindow,GW_HWndNext);
end;
end;
◇[DELPHI]关于键盘常量名
VK_BACK/VK_TAB/VK_RETURN/VK_SHIFT/VK_CONTROL/VK_MENU/VK_PAUSE/VK_ESCAPE
/VK_SPACE/VK_LEFT/VK_RIGHT/VK_UP/VK_DOWN
F1--F12:$70(112)--$7B(123)
A-Z:$41(65)--$5A(90)
0-9:$30(48)--$39(57)
◇[DELPHI]初步判断程序母语
DELPHI软件的DOS提示:This Program Must Be Run Under Win32.
VC++软件的DOS提示:This Program Cannot Be Run In DOS Mode.
◇[DELPHI]操作Cookie
response.cookies("name").domain:='http://www.086net.com';
with response.cookies.add do
begin
name:='username';
value:='username';
end
◇[DELPHI]判断鼠标按键
if GetAsyncKeyState(VK_LButton)<>0 then ... //左键
if GetAsyncKeyState(VK_MButton)<>0 then ... //中键
if GetAsyncKeyState(VK_RButton)<>0 then ... //右键
◇[DELPHI]按键接受消息
OnCreate事件中处理:Application.OnMessage:=MyOnMessage;
procedure TForm1.MyOnMessage(var MSG:TMSG;var Handle:Boolean);
begin
if msg.message=256 then ... //ANY键
if msg.message=112 then ... //F1
if msg.message=113 then ... //F2
end;
◇[DELPHI]文本编辑相关
checkbox1.checked:=not checkbox1.checked;
if checkbox1.checked then richedit1.font.style:=richedit1.font.style+[fsBold] else richedit1.font.style:=richedit1.font.style-[fsBold]//粗体
if checkbox1.checked then richedit1.font.style:=richedit1.font.style+[fsItalic] else richedit1.font.style:=richedit1.font.style-[fsItalic]//斜体
if checkbox1.checked then richedit1.font.style:=richedit1.font.style+[fsUnderline] else richedit1.font.style:=richedit1.font.style-[fsUnderline]//下划线
memo1.alignment:=taLeftJustify;//居左
memo1.alignment:=taRightJustify;//居右
memo1.alignment:=taCenter;//居中