ProcessStart Function

Action

Creates a new operating-system process and executes it.

Include file

Kernel.bdh

Syntax

ProcessStart( in hProc : number ): boolean;

Return value

true if successful.
false in case of an error. The GetLastError function may be used to retrieve the system error code.

Parameter	Description
hProc	The handle that identifies the process. It is returned by the ProcessInitialize function.

Example

dcltrans
  transaction TMain
  var
    hFile      : number;
    hProcessId : number;
    nStatus    : number;
    nRead      : number;
    sData      : string;
  begin
    // Create process and start it up...
    hProcessId := ProcessInitialize("application1.exe", PROCESS_DETACHED,
                        "", "c:\\temp\\", "c:\\temp\\out.txt");
    ProcessSetEnv(hProcessId, "temp", "c:\\temp\\");
    ProcessStart(hProcessId);

    // Wait for process to finish
    Wait(25.0);

    // Kill the process if it hasn't finished yet
    nStatus := ProcessGetState(hProcessId);

    if (nStatus <> PROCESS_STATE_FINISHED) then
      ProcessKill(hProcessId, PROCESS_KILLSINGLE);
    end;

    // Read the output of the process, written to a file
    FOpen(hFile, "c:\\temp\\out.txt", OPT_FILE_ACCESS_READ, OPT_FILE_OPEN);

    while FRead(hFile, sData, 1, nRead) do
      Write(sData);
    end;

    FClose(hFile);
    ProcessFree(hProcessID);
  end TMain;