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; -- CodeDll.iss --
;
; This script shows how to call functions in external DLLs (like Windows API functions)
; at runtime and how to perform direct callbacks from these functions to functions
; in the script.
[Setup]
AppName=My Program
AppVersion=1.5
WizardStyle=modern
DefaultDirName={autopf}\My Program
DisableProgramGroupPage=yes
DisableWelcomePage=no
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
; Install our DLL to {app} so we can access it at uninstall time.
; Use "Flags: dontcopy" if you don't need uninstall time access.
Source: "MyDll.dll"; DestDir: "{app}"
[Code]
const
MB_ICONINFORMATION = $40;
// Importing a Unicode Windows API function.
function MessageBox(hWnd: Integer; lpText, lpCaption: String; uType: Cardinal): Integer;
external 'MessageBoxW@user32.dll stdcall';
// Importing an ANSI custom DLL function, first for Setup, then for uninstall.
procedure MyDllFuncSetup(hWnd: Integer; lpText, lpCaption: AnsiString; uType: Cardinal);
external 'MyDllFunc@files:MyDll.dll stdcall setuponly';
procedure MyDllFuncUninstall(hWnd: Integer; lpText, lpCaption: AnsiString; uType: Cardinal);
external 'MyDllFunc@{app}\MyDll.dll stdcall uninstallonly';
// Importing an ANSI function for a DLL which might not exist at runtime.
procedure DelayLoadedFunc(hWnd: Integer; lpText, lpCaption: AnsiString; uType: Cardinal);
external 'DllFunc@DllWhichMightNotExist.dll 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);
MyDllFuncSetup(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. Press F9 to continue.
DelayLoadedFunc(hWnd, 'Hello from delay loaded function', 'DllFunc', MB_OK or MB_ICONINFORMATION);
except
// <Handle missing dll here>
end;
end;
Result := True;
end;
procedure CurUninstallStepChanged(CurUninstallStep: TUninstallStep);
begin
// Call our function just before the actual uninstall process begins.
if CurUninstallStep = usUninstall then begin
MyDllFuncUninstall(0, 'Hello from custom DLL function', 'MyDllFunc', MB_OK or MB_ICONINFORMATION);
// Now that we're finished with it, unload MyDll.dll from memory.
// We have to do this so that the uninstaller will be able to remove the DLL and the {app} directory.
UnloadDLL(ExpandConstant('{app}\MyDll.dll'));
end;
end;
// The following shows how to use callbacks.
function SetTimer(hWnd, nIDEvent, uElapse, lpTimerFunc: Longword): Longword;
external 'SetTimer@user32.dll stdcall';
var
TimerCount: Integer;
procedure MyTimerProc(Arg1, Arg2, Arg3, Arg4: Longword);
begin
Inc(TimerCount);
WizardForm.BeveledLabel.Caption := ' Timer! ' + IntToStr(TimerCount) + ' ';
WizardForm.BeveledLabel.Visible := True;
end;
procedure InitializeWizard;
begin
SetTimer(0, 0, 1000, CreateCallback(@MyTimerProc));
end;
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