PC World 2006 November/PCWorld_2006-11_cd.bin/system/innosetup/isetup-5.1.8.exe/{app}/Examples/CodeDll.iss

Text File | 2006-10-03 | 2KB | 55 lines

; -- CodeDll.iss --
;
; This script shows how to call DLL functions at runtime from a [Code] section.

[Setup]
AppName=My Program
AppVerName=My Program version 1.5
DefaultDirName={pf}\My Program
DisableProgramGroupPage=yes
UninstallDisplayIcon={app}\MyProg.exe
OutputDir=userdocs:Inno Setup Examples Output

[Files]
Source: "MyProg.exe"; DestDir: "{app}"
Source: "MyProg.chm"; DestDir: "{app}"
Source: "Readme.txt"; DestDir: "{app}"; Flags: isreadme
Source: "MyDll.dll"; Flags: dontcopy

[Code]
const
  MB_ICONINFORMATION = $40;

//importing a Windows API function
function MessageBox(hWnd: Integer; lpText, lpCaption: String; uType: Cardinal): Integer;
external '[e-mail] stdcall';

//importing a custom DLL function
procedure MyDllFunc(hWnd: Integer; lpText, lpCaption: String; uType: Cardinal);
external 'MyDllFunc@files:MyDll.dll stdcall';

//importing a function for a DLL which might not exist at runtime
procedure DelayLoadedFunc(hWnd: Integer; lpText, lpCaption: String; uType: Cardinal);
external '[e-mail] stdcall delayload';

function NextButtonClick(CurPage: Integer): Boolean;
var
  hWnd: Integer;
begin
  if CurPage = wpWelcome then begin
    hWnd := StrToInt(ExpandConstant('{wizardhwnd}'));

    MessageBox(hWnd, 'Hello from Windows API function', 'MessageBoxA', MB_OK or MB_ICONINFORMATION);

    MyDllFunc(hWnd, 'Hello from custom DLL function', 'MyDllFunc', MB_OK or MB_ICONINFORMATION);

    try
      //if this DLL does not exist (it shouldn't), an exception will be raised
      DelayLoadedFunc(hWnd, 'Hello from delay loaded function', 'DllFunc', MB_OK or MB_ICONINFORMATION);
    except
      //handle missing dll here
    end;
  end;
  Result := True;
end;