真是苦闷..这是个老问题，在很多论坛、讨论上出现过无数次讨论。 不过任我怎么试 还是没找到完好的解决办法.
可能是本人太过cn， 真希望有高人可以指点迷津啊. 说来简单，我的目的只是在执行数据库查询的时候，TAnimate上查找的图标能不断地动 让人感觉程序没有死！
unit Form1
....
....
procedure TForm1.DatabaseExecute;
begin
MessageForm:=TMessageform.Create(self);
MessageForm.Message_Pl.Caption:= '正在统计,请稍候...';
MessageForm.Showmodal;
MessageForm.Update;
Application.ProcessMessages ;
DoSearching().. //执行数据库的查询操作，需时20多秒，同时cpu上得很快 60% 70左右
MessageForm.close;
end;// 这个时候 MessageForm上的TAnimate上的aviFindFolder图标是不断的动的！
只不过 Showmodal了，下面的DoSearchaning就不会执行。
但是一旦改成 MessageForm.Show的话 TAnimate上的动画就一动不动了！但是数据库的查询倒是能正常出来.就是动画不动看了一些论坛上似是而非的资料 ，跟着于是傻傻地理所当然想到了 多线程！ 这真是架刀子上架，线程知识储备不多！
还是上把于是在Form1的开头，定义了一个公用函数 procedure SearchingMessage ;
begin
MessageForm:=TMessageform.Create(Application);
MessageForm.Message_Pl.Caption:= '正在统计,请稍候...';
MessageForm.ShowModal;
MessageForm.Update;
Application.ProcessMessages ;
end;同时修改了一下 procedure TForm1.DatabaseExecute;
begin
hThread:=CreateThread(nil,0,@SearchingMessage,nil,0,ThreadID); //创建了一个线程
if hThread=0 then Messagebox(Handle,'Didn’t CreateaThread',nil,MB_OK);
DoSearching().. end;
结果是，连那个等待的窗体都不出现了! 只是在数据出来那一刹那 兄弟我耳目清明才看得到一丝扶风掠影，它就这么一闪而过了
我想肯定是新线程打开窗体之后与原主线程之间的关系没调好
可是遍寻网上、坛坛，中文的英文的 都没有大虾给给出点点提示 我那是闷啊！
interfaceuses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs,ComCtrls, ExtCtrls ;type
TMessageForm = class(TForm)
Message_Pl: TPanel;
Avi: TAnimate;
procedure FormClose(Sender: TObject; var Action: TCloseAction);
procedure FormCreate(Sender: TObject);
procedure FormShow(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;implementation{$R *.dfm}{ TMessageForm }procedure TMessageForm.FormClose(Sender: TObject; var Action: TCloseAction);
begin
Screen.Cursor:=crDefault;
if Avi.Active then Avi.Active:=False;
end;procedure TMessageForm.FormCreate(Sender: TObject);
begin
self.Avi.Active:=True;
end;procedure TMessageForm.FormShow(Sender: TObject);
begin
// Screen.Cursor:=crSQLWait;
self.Avi.Active:=True;
end;end.
//xiedewei 20101010
interfaceuses
Windows, Controls, Forms, Classes, ComCtrls, StdCtrls, Dialogs, SysUtils,
Messages;type
TWaitDlg = class(TForm)
lblPrompt: TLabel;
Animate: TAnimate;
procedure FormCreate(Sender: TObject);
private
procedure WMNCHitTest(var Message: TWMNCHitTest); message WM_NCHITTEST;
public
procedure Show(Style: Integer);
procedure Update(Msg: string); reintroduce;
procedure Close;
end;procedure OpenWaitWnd(Msg: string; Style: Integer = 4);
procedure UpdateWaitWnd(Msg: string);
procedure CloseWaitWnd;implementation{$R *.DFM}var
theWaitWindow: TWaitDlg = nil;procedure OpenWaitWnd(Msg: string; Style: Integer = 4); export;
begin
if not Assigned(theWaitWindow) then
theWaitWindow := TWaitDlg.Create(nil);
theWaitWindow.Show(Style);
theWaitWindow.Update(Msg);
end;procedure UpdateWaitWnd(msg: string); export;
begin
if Assigned(theWaitWindow) then
theWaitWindow.Update(Msg);
end;procedure CloseWaitWnd; export;
begin
if Assigned(theWaitWindow) then
theWaitWindow.Close;
end;{ TWaitDlg }procedure TWaitDlg.Show(Style: Integer);
begin
Animate.CommonAVI := TCommonAVI(Style);
Animate.Active := True;
SetWindowPos(Handle, HWND_TOP, (Screen.Width - Width) shr 1,
(Screen.Height - Height shl 1) shr 1, 0, 0, SWP_SHOWWINDOW or SWP_NOACTIVATE or SWP_NOSIZE);
end;procedure TWaitDlg.Update(Msg: string);
begin
lblPrompt.Caption := Msg;
inherited Update;
end;procedure TWaitDlg.Close;
begin
ShowWindow(Handle, SW_HIDE);
Animate.Active := False;
end;procedure TWaitDlg.FormCreate(Sender: TObject);
begin
AlphaBlend := True;
BorderStyle := bsToolWindow;
ShowWindow(Animate.Handle, SW_SHOWNORMAL);
end;procedure TWaitDlg.WMNCHitTest(var Message: TWMNCHitTest);
begin
Message.Result := HTTRANSPARENT;
end;initializationfinalization
if Assigned(theWaitWindow) then
FreeAndNil(theWaitWindow);end.
使用方法：
uses WaitDialog;OpenWaitWnd('正在统计,请稍候...');
DoSearching().. //执行数据库的查询操作，需时20多秒，同时cpu上得很快 60% 70左右
CloseWaitWnd;