怎样触发delphi 中的progressbar

如题，谢谢各位大虾

答案：使用max,step,stepby等属性,大致如下(step : integer):
    step := 9000;
   progressbar1.Max := step;
   progressbar1.Step :=1;
   progressbar1.StepBy(250);
 delphi帮助有例子(传输文件):
 procedure TForm1.Button2Click(Sender: TObject);
  
const
   // On Windows replace, myfile with a pathname such as c:\\autoexec.bat
   FName = 'MyFile';
 var
   F: File;
   MyData: array[1..2048] of byte;
   BytesRead: LongInt;
 begin
   AssignFile(F, FName);
   try
  
Reset(F);
  
ProgressBar1.Max := FileSize(F);
  
if (ProgressBar1.Max > 10) then
  
  ProgressBar1.Step := ProgressBar1.Max div 10
  
else
  
  ProgressBar1.Step := ProgressBar1.Max;
  
while (ProgressBar1.Position < ProgressBar1.Max) do
  
begin
  
  // read one Step size chunk of data to buffer
  
  BlockRead(F, MyData, ProgressBar1.Step, BytesRead);
  
  // move the ProgressBar Position using StepIt
  
  ProgressBar1.StepIt; // move by Step amount
  
end;
   finally;
  
CloseFile(F);
   end;
 end;

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