(*)Form淡出 1)AnimateWindow(Form1.Handle,1000,AW_BLEND);//淡入 AnimateWindow(Form1.Handle,1000,AW_HIDE or AW_BLEND);//淡出 2)窗体有AlphaBlend属性和AlphaBlendValue属性,将AlphaBlend属性设为True,然后在Timer组件中随着时间改变AlphaBlendValue的值(0-255)即可 AlphaBlendValue:=1;//窗体透明
(*)捕捉Form最小化 定义一个过程 public procedure onminsize(var msg:twmsyscommand);message wm_syscommand; procedure TForm1.onminsize(var msg: twmsyscommand); begin if msg.CmdType=SC_MINIMIZE then begin form1.Width:=100; form1.Height:=100; form1.Left:=100; form1.Top:=300; exit; end; inherited; end;
(*)createGuid(out newGUID) s:=GUIDToString(newGUID)
(*)四舍五入取正: y:=Round(x)
(*) string:=StringReplace(string1,''''*'''',''''#'''',[rfReplaceAll]);
(*)把一个string用单引号括起来作为string返回 QuotedStr(const S: string): string
(*) 如何让DBGRID中的内容分页显示 ADODataSet1.Open; ADODataSet1.Recordset.PageSize := 10; //显示第一页 ADODataSet1.Recordset.AbsolutePosition := 1; ADODataSet1.Recordset.PageSize := 10; //显示第二页 ADODataSet1.Recordset.AbsolutePosition := 11;
(*)实现解析IP地址为主机域名 uses WinSock 过程如下: function IPAddrToName(IPAddr : String): String; var SockAddrIn: TSockAddrIn; HostEnt: PHostEnt; WSAData: TWSAData; begin WSAStartup($101, WSAData); SockAddrIn.sin_addr.s_addr:= inet_addr(PChar(IPAddr)); HostEnt:= gethostbyaddr(@SockAddrIn.sin_addr.S_addr, 4, AF_INET); if HostEnt<>nil then begin result:=StrPas(Hostent^.h_name) end else begin result:=''''''''; end; end; 使用函数: var Name: string; begin Name := InputBox(''''输入对方主机IP'''', ''''主机IP地址:'''', ''''''''); showmessage(IpAddrToName(Name)); end;
(*)去掉twebbrowser右边的ScrollBar WebBrowser1.oleobject.Document.body.Scroll := ''''no'''';
(*)TTreeView的结点如何具有CheckBox TreeView有个Images属性,做三张小图片: 全选中、部分选中、不选状态(直接拍下CheckBox三种状态的图片在加工一下就可以了),然后在点击事件中根据具体情况设置TTreeNodes的ImageIndex就OK了。 重载TreeView的CreateParams: type TCheckBoxTreeView = class(TTreeView) protected procedure CreateParams(var Params: TCreateParams); override; end;
procedure TCheckBoxTreeView.CreateParams(var Params: TCreateParams); begin inherited; Params.Style:=Params.Style or TVS_CHECKBOXES; { TVS_CHECKBOXES declared in CommCtrl } end;
如果要Check这个CheckBox,可以用下面的代码: function IsNodeChecked(Node :TTreeNode) :Boolean; const TVIS_CHECKED = $2000; var TvItem :TTVItem; begin TvItem.Mask := TVIF_STATE; TvItem.hItem := Node.ItemId; TreeView_GetItem(Node.TreeView.Handle, TvItem); Result := (TvItem.State and TVIS_CHECKED) = TVIS_CHECKED; end;
procedure SetNodeChecked(Node :TTreeNode; Checked :Boolean); const TVIS_CHECKED = $2000; var TvItem :TTVItem; begin FillChar(TvItem, SizeOf(TvItem), 0); with TvItem do begin hItem := Node.ItemId; Mask := TVIF_STATE; StateMask := TVIS_STATEIMAGEMASK; if Checked then TvItem.State :=TVIS_CHECKED else TvItem.State :=TVIS_CHECKED shr 1; TreeView_SetItem(Node.TreeView.Handle, TvItem); end; end; 可以做成事件和封装成一个类: private OldState :Boolean;
procedure Change(Node: TTreeNode); override; begin inherited Change(Node); OldState := IsNodeChecked(Node); end;
procedure Click; override; var NewState :Boolean; begin inherited Click; NewState := IsNodeChecked(Self.Selected); if NewState = OldState then Exit; if (NewState) and Assigned(OnNodeChecked) then OnNodeChecked() else if (not NewState) and Assigned(OnNodeUnChecked) then OnNodeUnChecked()
// OnNodeChecked & OnNodeUnchecked will be events that you declare end;
(*)如何将stringgrid中每列的数据居中显示? (1)将stringgrid的defaultdraw设为:false; (2)procedure TForm1.StringGrid1DrawCell(Sender: TObject; ACol, ARow: Integer; Rect: TRect; State: TGridDrawState); var sText: string; begin with StringGrid1 do begin sText := Cells[ACol, ARow]; if sText <> '''''''' then begin Canvas.FillRect(Rect); DrawText(Canvas.Handle, PChar(sText), Length(sText), Rect, DT_CENTER or DT_VCENTER or DT_SINGLELINE); end; end; end;
DLL获得自己所在的路径:Windows.GetModuleFileName(HInstance,lp, 100);
Caption := Copy(Edit1.Text, 3, MaxInt); //建议,少计算一次
取得explorer句柄,线程 GetWindowThreadProcessID(FindWindow(''''ExploreWClass'''', nil), nil) FindWindow(''''ExploreWClass'''', nil)
调用记事本 uses .... shellapi; shellexecute(handle,nil,pchar(''''c:\windows\notepad''''),nil,nil,sw_shownormal);
用回车代替TAB 在onkeypress 写 if key=#13 then perform(WM_NEXTDLGCTL,0,0);
fieldName like "%''''+gA_FindValue+''''%"''''
formatFloat(''''0.00'''',doubleValue); //格式化 Float ---> string
mailto:whj@aa.com?subject=subjectTille ( &Attach=C:\Config.sys )
//返回给定月份的天数 uses SysUitls; // IsLeapYear ... function DaysOfMonth(Date: TDateTime): integer; var y, m, d: Word; begin DecodeDate( Date, y, m, d ); case m of 2: if IsLeapYear(y) then Result:=29 else Result:=28; 1,3,5,7,8,10,12: Result:=31; 4,6,9,11: Result:=30; end; end;
//触发一个错误 raise Exception.Create(''''delete table Error'''');
//获取 IP 地址 (getIP.exe) procedure TForm1.Button1Click(Sender: TObject); var wVersionRequested : WORD; wsaData : TWSAData; p : PHostEnt; s : array[0..128] of char; p2 : pchar; OutPut:array[0..100] of char; begin {Start up WinSock} wVersionRequested := MAKEWORD(1, 1); WSAStartup(wVersionRequested, wsaData);
{Get the computer name} GetHostName(@s, 128); p := GetHostByName(@s);
{Get the IpAddress} p2 := iNet_ntoa(PInAddr(p^.h_addr_list^)^); StrPCopy(OutPut,''''Hostname: ''''+Format(''''%s'''', [p^.h_Name])+#10#13+ ''''IP address: ''''+Format(''''%s'''',[p2]) ); WSACleanup; MessageBox(0,OutPut,''''Get IP ! - this is your IP Address'''',mb_ok or mb_iconinformation); end;
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