uses
  ShellAPI, {Shellexecute}
  Windows, {WaítforSingleObject}
  Forms, {Application.}
  SysUtils; {TSearchRec, Findfirst, etc.}
  
  { Messages,  Variants, Classes, Graphics, Controls,
  Dialogs;   }

function ShellExecuteAndWait(Operation, FileName, Parameter, Directory: string;
  Show: Word; bWait: Boolean): Longint;

implementation

function ShellExecuteAndWait(Operation, FileName, Parameter, Directory: string;
  Show: Word; bWait: Boolean): Longint;
var
  bOK: Boolean;
  Info: TShellExecuteInfo;
{
  ****** Parameters ******
  Operation:

  edit      Launches an editor and opens the document for editing.
  explore    Explores the folder specified by lpFile.
  find      Initiates a search starting from the specified directory.
  open      Opens the file, folder specified by the lpFile parameter.
  print      Prints the document file specified by lpFile.
  properties Displays the file or folder's properties.

  FileName:

  Specifies the name of the file or object on which
  ShellExecuteEx will perform the action specified by the lpVerb parameter.

  Parameter:

  String that contains the application parameters.
  The parameters must be separated by spaces.

  Directory:

  specifies the name of the working directory.
  If this member is not specified, the current directory is used as the working directory.

  Show:

  Flags that specify how an application is to be shown when it is opened.
  It can be one of the SW_ values

  bWait:

  If true, the function waits for the process to terminate
}
begin
  FillChar(Info, SizeOf(Info), Chr(0));
  Info.cbSize := SizeOf(Info);
  Info.fMask := SEE_MASK_NOCLOSEPROCESS;
  Info.lpVerb := PChar(Operation);
  Info.lpFile := PChar(FileName);
  Info.lpParameters := PChar(Parameter);
  Info.lpDirectory := PChar(Directory);
  Info.nShow := Show;
  bOK := Boolean(ShellExecuteEx(@Info));
  if bOK then
  begin
    if bWait then
    begin
      while WaitForSingleObject(Info.hProcess, 100) = WAIT_TIMEOUT
        do Application.ProcessMessages;
      bOK := GetExitCodeProcess(Info.hProcess, DWORD(Result));
    end
    else
      Result := 0;
  end;
  if not bOK then Result := -1;
end;