System.ParamCount Function

Returns the number of parameters passed on the command line.

Pascal

function ParamCount: Integer;

C++

int ParamCount();

File

System

Description

ParamCount returns the number of parameters passed to the program on the command line. Separate parameters with spaces or tabs. Use double quotes to wrap multiple words as one parameter (such as long file names containing spaces).

Delphi Examples:

Copy Code

{
The following example beeps once for each "beep" passed in
on the command line.  The example terminates the application
if  "exit" is passed in on the command line.  Build the
project to generate a .exe file and then execute that file
from a command line: "ParamCount_proj beep beep exit".
} 
procedure TForm1.FormCreate(Sender: TObject);
var
  i: Integer;
begin
//  Use print statements since you can't use the debugger.
//  MessageDlg(
//    'System ParamCount = ' + IntToStr(System.ParamCount),
//    mtConfirmation, [mbOK], 0);
  for i := 1 to System.ParamCount do
  begin
    if LowerCase(ParamStr(i)) = 'beep' then
      Beep
    else if LowerCase(ParamStr(i)) = 'exit' then
      Application.Terminate;
    Sleep(250);
  end;
end;