Question : ShellExecute SW_HIDE

When using ShellExecute SW_HIDE, how do you get the handle to un-hide the application using ShowWindow?

Answer : ShellExecute SW_HIDE

The classname for notepad is not notepad.exe...
However, here's something you might be interested in. Peter below to the rescue again...

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unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ShellAPI, TlHelp32;

type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

type
  TEnumData = record
    hW: HWND;
    pID: DWORD;
  end;

function EnumProc( hw: HWND; var data: TEnumData ): Bool; stdcall;
var
  pID: DWORD;
begin
  Result := True;
  if (GetWindowLong(hw, GWL_HWNDPARENT) = 0) and
     (IsWindowVisible( hw ) or IsIconic(hw)) then
  begin
    GetWindowThreadProcessID( hw, @pID );
    If pID = data.pID then
    begin
      data.hW := hW;
      Result := False;
    end; { If }
  end; { If }
end; { EnumProc }

function WindowFromProcessID( pID: DWORD ): HWND;
var
  data: TEnumData;
begin
  data.pID := pID;
  data.hW := 0;
  EnumWindows( @EnumProc, longint(@data) );
  Result := data.hW;
end; { WindowFromProcessID }

function WindowFromAppname32( appname: String ): HWND;
  { Take only the application filename, not full path!
    Need to pass the extension as well. }
var
  snapshot: THandle;
  processEntry : TProcessEntry32;
begin
  Result := 0;
  appName := UpperCase( appname );
  snapshot := CreateToolhelp32Snapshot(
                TH32CS_SNAPPROCESS,
                0 );
  if snapshot <> 0 then
  try
    processEntry.dwSize := Sizeof( processEntry );
    if Process32First( snapshot, processEntry ) then
    repeat
      if AnsiCompareText(
           appname,
           ExtractFilename( StrPas(processEntry.szExeFile))
           ) = 0
      then
      begin
        Result:= WindowFromProcessID( processEntry.th32ProcessID);
        Break;
      end; { If }
    until not Process32Next( snapshot, processEntry );
  finally
    CloseHandle( snapshot );
  end; { try }
end; { WindowFromAppname32 }

procedure TForm1.Button1Click(Sender: TObject);
var
  x: THandle;
begin
  ShellExecute(0, 'open', 'c:\WINDOWS\notepad.exe','', '', SW_SHOW);
  x := WindowFromAppname32('NotePad.exe');
  ShowMessage(IntToStr(x));
end;

end.